Gemstones auctions
The subject of this auction is a natural diamond weighing 0.19 ct in an elegant, timeless pear shape. The stone features a vibrant, exquisite canary yellow color (Fancy Yellow) and a clarity grade of P1. * Certificate: The diamond comes with an original certificate from an appraiser of the Polish Gemmological Society, featuring a catalog photo and a QR code. * Expert: Jan Karaszkiewicz—a dis...
The subject of this auction is a natural diamond weighing 0.22 ct in a classic pear shape. The stone features a rare and exceptionally striking color combination—Fancy Deep Reddish-Orange—as well as good transparency and Si2 clarity.* Certificate: The diamond comes with an original certificate from an appraiser of the Polish Gemmological Society, featuring a catalog photo and a QR code.* E...
Natural Diamond 0.19 ct - Heart - Fancy Yellow - Si2 - HRD Alumni Certificate - Estimated value: approx. 6,300 PLN (gross) * Certificate: The diamond comes with an original certificate from an appraiser of the Polish Gemmological Society, featuring a catalog photo and a QR code. * Expert: Jan Karaszkiewicz – a distinguished expert on colored gemstones, a highly regarded diamond appraiser, an...
Natural Diamond 0.17 ct - Fancy Deep Blue - P3 - HRD Alumni Certificate - Estimated Value: approx. 2,190 PLN (gross) The subject of this auction is a natural diamond weighing 0.17 ct with a classic round brilliant cut. The stone features a rare, deep blue color (Fancy Deep Blue) and a P3 clarity grade. * Certificate: The diamond comes with an original certificate from an appraiser of the Polis...
An investment-grade, 100% natural diamond weighing 0.24 ct, cut in an exceptionally elegant and sensual pear shape. The stone captivates with its subtle, sunny Fancy Natural Light Yellow color, characterized by a pure, bright hue. The most important and exclusive feature of this specimen is its extraordinary, Vs1 clarity—a rarity among colored diamonds—which guarantees the absence of any i...
The item offered is a 100% natural diamond weighing 0.33 ct, cut into the classic, most sought-after, and timeless round brilliant cut.The stone is distinguished by its absolutely unique, highest possible clarity grade: Internally Flawless (IF). This means that the diamond is internally flawless—free of any inclusions or internal imperfections, even under 10x microscopic magnification. The p...
IGI Natural Diamond 0.38 ct VVS1 Fancy Brownish Yellow (Marquise Cut) - Exceptional Clarity!
684 EUR
Natural Diamond 0.38 ct Fancy Brownish Yellow (marquise cut) – IGI Certificate A true showcase of jewelry craftsmanship and rarity—a natural diamond certified by IGI, the most renowned international laboratory, with a VVS1 clarity that is phenomenal and extremely rare on the auction market.The VVS1 grade represents the absolute elite in the world of gemology. This means that the stone is n...
The subject of this auction is a natural diamond weighing 0.15 ct with a classic round brilliant cut. The stone captivates with its rare, deep blue color (Fancy Deep Blue) and has a clarity grade of P3. * Certificate: The diamond comes with an original certificate from an appraiser of the Polish Gemmological Society, featuring a catalog photo and a QR code. * Expert: Jan Karaszkiewicz—a dist...
A phenomenal specimen dedicated to enthusiasts of unique gems and the most discerning collectors—a natural diamond in the extremely rare, mesmerizing Fancy Intense Orange color. The high “Intense” saturation grade for a pure orange hue without dominant brown tones is an absolute gemological rarity, representing a minuscule percentage of the world’s colored diamond finds.The stone featu...
A spectacular and highly sought-after masterpiece of nature, carefully selected for the most discerning collectors and investors in alternative markets. This luxurious diamond stands out with an impressive carat weight of 0.69 carats, placing it among the very best in its category. The specimen displays a stunning, pure Fancy Yellow saturation grade—that is, the world-renowned, elite “Cana...
The subject of this auction is a natural diamond weighing 0.20 ct, cut in a modified square cushion shape. The stone is distinguished by its fully natural, exceptionally deep, and highly desirable color: Fancy Intense Brownish Yellow. The stone’s clarity has been graded as I.The most important advantage of this specimen is the 100% natural origin of its color—spectrophotometric tests in th...
An absolute behemoth and a rarity on the auction market—a natural black diamond weighing a spectacular 1.94 carats, backed by a prestigious, international IGI certificate.Stones weighing close to 2 carats are truly one-of-a-kind, large-sized gems in the jewelry world. This specimen has a gigantic diameter (over 7.5 mm!), which means that when set—for example, in a luxurious men’s signet ...
The subject of this auction is a natural diamond weighing 0.06 ct with a classic round brilliant cut. The stone features a deep, exquisite canary yellow color (Fancy Deep Yellow) and an Si2 clarity grade. * Certificate: The diamond comes with an original certificate from an appraiser of the Polish Gemmological Society (Diamond Sky), featuring a catalog photo and a QR code. * Expert: Jan Karas...
Classic elegance and the perfect introduction to the world of investment diamonds—a natural diamond in the highly sought-after Teardrop cut, weighing 0.24 carats and featuring a beautiful, pastel Fancy Light Yellow color. This specimen captivates with its subtle, pure shade of light canary yellow, which beautifully illuminates the stone and gives it a unique charm. The Pear shape, due to its...
A FASCINATING TEARDROP! Natural Diamond 0.32 ct FANCY DEEP ORANGE - Unique Orange Color, Teardrop Cut CLARITY: P1 | Clarity P1 | Official price: approximately 10,958 PLN gross!A stunning and exceptionally original piece created for true enthusiasts and seasoned collectors of natural colored diamonds. This highly sought-after specimen captivates with its unique, deep Fancy Deep Orange (Fancy De...
An exceptionally romantic gem and a truly rare collector’s item—a natural diamond in the highly sought-after, elite Heart-Shaped cut, with a substantial weight of 0.42 carats and a unique, multi-tonal Fancy Brownish Greenish Yellow color. The Heart-shaped cut is one of the most difficult to execute and the most exclusive fancy cuts in the world. This specimen captivates with its original, ...
Natural Diamond 0.34 ct VERY HIGH CLARITY VVS2 Fancy Brownish Yellow (oval cut) - IGI Certificate
684 EUR
Natural Diamond 0.34 ct Fancy Brownish Yellow (Oval Cut) – IGI Certificate The subject of this auction is a natural diamond weighing 0.34 carats with an elegant oval modified brilliant cut. The stone features a unique Natural Fancy Brownish Yellow color and a very high clarity grade of VVS2 (very, very small inclusions, invisible to the naked eye). The diamond is originally packaged in a sec...
A true rarity for connoisseurs and discerning investors—a 0.31 ct natural diamond in an elegant, luxurious cushion cut. The stone captivates with its deep, highly sought-after Fancy Deep Greenish Yellow color. The rare and unique combination of sunny yellow with a distinct olive-greenish tone and deep saturation places this specimen among the elite group of sought-after colored diamonds. The...
An exceptionally valuable specimen for connoisseurs of jewelry art and seasoned collectors—a natural diamond in a vivid, sunny Fancy Yellow color. This classic saturation grade is the sought-after, elite “Canary Yellow” hue, which—due to its pure, saturated shade free of brown undertones—accounts for only a fraction of the global market for natural colored diamonds.The stone stands o...
An investment-grade, 100% natural diamond weighing 0.42 ct, cut in the prestigious, modern Radiant cut. The stone captivates with its exceptionally rich, deep, and luxurious Fancy Deep Yellowish-Brown (Fancy Deep Yellowish-Brown), which combines chocolate tones with a honey-gold luster.The Radiant cut, with its excellent proportions, symmetry, and finish, perfectly concentrates incoming light,...
An impressive size and unique character—a natural diamond in a classic, luxurious teardrop cut, with a substantial, rare weight of 0.66 carats, which proudly surpasses standard investment stones. This specimen captivates with its unique, exceptionally original smoky-canary color (Fancy Grayish Yellow). This intriguing, deep shade, combined with the slender, elongated Pear (Pear) cut with a s...
A natural diamond in the rare and highly sought-after Fancy Brownish Yellow color, weighing over half a carat (0.54 ct). A classic and highly sought-after cut with excellent proportions and very good symmetry, which ensure a beautiful, deep fire and excellent light dispersion. The stone features a high investment-grade clarity of Si1 and a complete lack of fluorescence, which is a huge advan...
NATURAL COLORED DIAMOND 0.24 CT | CLARITY: Si1 | CUT: Radiant Official Appraiser’s Valuation: 2,915.10 USD / 10,873 PLN gross (as of August 24, 2026) DOCUMENTATION AND EXPERT APPRAISAL: Certificate: The diamond comes with a certificate from an appraiser of the Polish Gemmological Society (Diamond Sky) featuring a catalog photo and a QR code. Expert: Jan Karaszkiewicz – a distinguished expe...
An investment-grade, 100% natural diamond weighing 0.30 ct, featuring an elegant, luxurious modified cushion cut. The stone captivates with its subtle, sunny Fancy Natural Light Yellow color, characterized by a pure, bright hue without any traces of brown or gray. The Cushion cut, with its excellent proportions, symmetry, and finish, perfectly concentrates incoming light, releasing a unique br...
A true rarity for connoisseurs and the most discerning collectors—a natural diamond in the spectacular, legendary Fancy Vivid Yellow color. The Vivid saturation grade is the absolute highest and most valuable color grade for yellow diamonds, accounting for a fraction of a percent of global production. The stone features the highly sought-after cushion cut, which brilliantly concentrates ligh...
The subject of this auction is a natural diamond weighing 0.18 ct with a classic round brilliant cut. The stone catches the eye with its intense, deep blue color (Fancy Deep Blue) and has a clarity grade of P3. * Certificate: The diamond comes with an original certificate from an appraiser of the Polish Gemmological Society, featuring a catalog photo and a QR code. * Expert: Jan Karaszkiewicz�...
A stunning and majestic piece dedicated to the most discerning collectors and investors—a natural diamond in an exceptionally saturated, deep Fancy Intense Yellow color. This coveted saturation grade represents the elite “Canary Yellow” color without any brown undertones. The prestige of this specimen is further enhanced by the fact that it has surpassed the magical half-carat (0.51 ct) ...
A STUNNING 0.58 ct OVAL! Natural FANCY LIGHT YELLOW P1 Diamond Gross Price: approx. 13,400 PLN
513 EUR
An investment-grade, 100% natural diamond with an impressive weight of 0.58 ct (well above the psychological half-carat threshold) in an elegant, timeless oval cut. The stone captivates with its beautiful, sunny Natural Fancy Light Yellow color, characterized by a pure hue with excellent jewelry appeal.The oval cut, with its good proportions and symmetry, optically enlarges the stone, maximizi...
THE KING OF INVESTMENTS! A true rarity for connoisseurs—a natural diamond with a phenomenal, intense Fancy Intense Yellow color (Elite Canary Color).Diamonds with an “Intense” saturation represent an elite and extremely rare group among colored diamonds, ranking among the most sought-after investment assets on the international auction market. This specimen captivates with its deep, pure...
An impressive size and a regal investment-grade color—a natural diamond in an exceptionally elegant and sought-after pear cut, with a substantial weight of 0.51 carats, proudly surpassing the prestigious half-carat mark. This specimen captivates with its outstanding, exceptionally rich and deep canary yellow color (Fancy Deep Yellow) with a pure, sunny hue, completely free of common gray or ...
A true rarity for connoisseurs and discerning investors—a natural diamond weighing 0.20 ct, cut in an exceptionally sensual and elegant pear shape. The stone captivates with its deep, rare “Fancy Deep Greenish Yellow” color. The unique combination of sunny yellow with a distinct olive-greenish tone and deep saturation places this specimen among the elite group of the most sought-after co...
An investment-grade, 100% natural diamond weighing 0.30 ct in an elegant, timeless oval cut. The stone captivates with its subtle, sunny Fancy Natural Light Yellow color, characterized by a pure, bright hue without any traces of brown or gray. The oval cut, with its excellent proportions and very good symmetry, beautifully elongates the stone optically, making it appear larger in person. The s...
An investment-grade, 100% natural diamond weighing 0.29 ct, cut in the prestigious, modern Radiant cut. The stone captivates with its deep, dignified Fancy Deep Orangy Brown color, which uniquely combines luxurious shades of dark chocolate with warm, fiery orange highlights. The most important and elite feature of this specimen is its extraordinary clarity—Vs1—which is extremely rare in co...
An investment-grade, natural diamond weighing 0.53 ct (over half a carat) in a unique, rare pear cut. The stone captivates with its exceptionally complex, rich, and deep Fancy Deep Brownish Orangy Yellow color, which combines luxurious shades of brown, warm orange, and golden yellow. The pear cut beautifully elongates the stone optically, making it the perfect choice as the centerpiece of a ...
An investment-grade, natural diamond weighing 0.46 ct with an exceptionally deep, saturated Fancy Deep Yellowish Brown color. The stone features a modified cushion cut—highly sought-after in the premium segment—which brilliantly captures light within its structure, enhancing its dark, vivid hue. The specimen features good clarity (Si2) and a complete lack of fluorescence, which is a key ad...
THE KING OF INVESTMENTS! A true rarity for the most discerning connoisseurs—a natural diamond with a phenomenal, exceptionally saturated Fancy Deep Yellow color.Deep-saturation diamonds constitute an elite and extremely rare group among colored diamonds, ranking among the most coveted and sought-after investment assets on the international auction market. This specimen captivates with its de...
An investment-grade, 100% natural diamond weighing 0.39 ct in a luxurious, classic oval cut. The stone dazzles with its canary-yellow, exceptionally pure Fancy Yellow color, characterized by a deep, sunny hue completely free of any brown or gray undertones.The oval cut, with its excellent proportions, very good symmetry, and finish, perfectly highlights the stone’s apparent size, giving it i...
An investment-grade, 100% natural diamond weighing 0.31 ct, cut in an exceptionally sensual and elegant pear shape. The stone captivates with its deep, highly sought-after Fancy Deep Orangy Yellow color. The unique combination of sunny yellow with a distinct, warm orange tone places this specimen among the elite group of the most sought-after colored diamonds. The pear cut has received the hig...
NATURAL COLORED DIAMOND 0.24 CT | CLARITY: VVS1 | CUT: HEART Official appraiser’s valuation: $3,272 gross (approx. 12,500 PLN gross) Investment Opportunity: A natural diamond with a unique “Heart” cut, valued at approximately 13,100 PLN gross!We are pleased to present to you an exceptional natural diamond with a rare fancy color, representing an ideal investment and a unique treat for co...
An outstanding collector’s item and a safe investment—a natural diamond with an ideal investment weight of 0.33 carats, captivating with its pure, elite Fancy Yellow canary color and excellent Si1 clarity. This specimen has been cut into the highly prestigious Modified Cushion shape. This cut is adored by connoisseurs worldwide because its unique facet architecture allows for maximum light...
A true rarity for connoisseurs and the most discerning collectors—a natural diamond in the stunning, extremely rare Fancy Natural Light Purple color. Alongside pink and red, natural purple is indisputably the rarest and most sought-after diamond color in the world, with a global supply that is virtually nonexistent. This particular specimen captivates with its beautiful, subtle, and 100% n...
NATURAL COLORED DIAMOND 0.33 CT | CLARITY: SI2 | CUT: TEARDROP Official Appraiser’s Valuation: 3,555 USD - 13,225 PLN (as of September 3, 2026) DOCUMENTATION AND EXPERT APPRAISAL: Certificate: The diamond comes with a certificate from an appraiser of the Polish Gemmological Society (Diamond Sky) featuring a catalog photo and a QR code. Expert: Jan Karaszkiewicz – a distinguished expert on ...
NATURAL COLORED DIAMOND 0.25 CT | CLARITY: SI1 | CUT: OVAL Official appraiser’s valuation: $2,743 gross (approx. 11,000 PLN gross) DOCUMENTATION AND EXPERT APPRAISAL: Certificate: The diamond comes with a Certificate from an Appraiser of the Polish Gemmological Society (Diamond Sky) featuring a catalog photo and a QR code. Expert: Jan Karaszkiewicz – a distinguished expert on colored gemst...
A unique harmony of modern cut and depth of color—a natural diamond in the sought-after, prestigious Radiant cut, with a consistent weight of 0.31 carats and a beautiful, warm Fancy Deep Orangy Brown color. This specimen captivates with its charming, deep honey-amber hue featuring distinct orange tones that beautifully illuminate the stone and give it a unique character. The modern Radiant c...
NATURAL COLORED DIAMOND 0.24 CT | CLARITY: VVS1 | CUT: EMERALD Official appraiser’s valuation: $3,272 gross (approx. 13,100 PLN gross) DOCUMENTATION AND EXPERT APPRAISAL: Certificate: The diamond comes with a Certificate from an Appraiser of the Polish Gemmological Society (Diamond Sky, a company that has been operating on the Polish market for 30 years) featuring a catalog photo and a QR co...
NATURAL COLORED DIAMOND 0.31 CT | CLARITY: SI2 | CUT: RADIANT Official appraiser’s valuation: $3,998 gross (approx. 16,000 PLN gross) DOCUMENTATION AND EXPERT APPRAISAL: Certificate: The diamond comes with a Certificate from an Appraiser of the Polish Gemmological Society (Diamond Sky) featuring a catalog photo and a QR code. Expert: Jan Karaszkiewicz—a distinguished expert on colored gems...
NATURAL COLORED DIAMOND 0.55 CT | CLARITY: P1 | CUT: MODIFIED SQUARE CUSHION Official Appraiser’s Valuation: 3,198 USD – 11,897 PLN (as of 9/3/26) DOCUMENTATION AND EXPERT APPRAISAL: Certificate: The diamond comes with a certificate from an appraiser of the Polish Gemmological Society (Diamond Sky) featuring a catalog photo and a QR code. Expert: Jan Karaszkiewicz – a distinguished exper...
Natural Fancy Color Diamond, 1.74 ct, SI2. Gross appraisal value: 24,088.32 PLN Official appraiser’s valuation: 6,273 USD (exactly 24,088.32 PLN gross, converted at the exchange rate of 3.84 PLN as of September 27, 2026) DOCUMENTATION AND EXPERT APPRAISAL: Certificate: The diamond is accompanied by a Certificate from an Appraiser of the Polish Gemmological Society (Diamond Sky, a company ope...
NATURAL COLORED DIAMOND 0.26 CT | OVAL CUT | PRICE APPROX. 11,000 PLN GROSSA natural colored diamond with a spectacular, exceptionally rare Fancy Deep Orange color in a classic, brilliant oval cut. The starting price of just 1,500 PLN gross (+20% auction fee) is an excellent investment opportunity—bidding starts at less than 14% of the official market valuation!DOCUMENTATION AND EXPERT APPRA...
NATURAL COLORED DIAMOND 0.26 CT | CLARITY: SI2 | CUT: CUSHION Official appraiser’s valuation: $2,460 gross (approx. 9,500 PLN gross) DOCUMENTATION AND EXPERT APPRAISAL: Certificate: The diamond comes with a Certificate from an Appraiser of the Polish Gemmological Society (Diamond Sky) featuring a catalog photo and a QR code. Expert: Jan Karaszkiewicz – a distinguished expert on colored gem...
A phenomenal collector’s rarity and an elite investment—a natural diamond in the prestigious Cushion cut, weighing a substantial 0.47 carats and featuring a Fancy Deep Gray color that is extremely rare on the auction market. Natural gray diamonds with “Deep” saturation are absolute gemological gems, sought after by connoisseurs around the world. This specimen captivates with its pure, ...
An investment-grade, 100% natural diamond weighing 0.30 ct, featuring an elegant, luxurious oval cut (Oval). The stone captivates with its subtle, sunny Fancy Light Yellow color, characterized by a pure, bright hue without any traces of brown or gray. The oval cut, with its excellent proportions, symmetry, and finish, perfectly concentrates incoming light, releasing a unique brilliance from wi...
NATURAL COLORED DIAMOND 0.26 CT | CLARITY: SI2 | CUT: CUSHION Official appraiser’s valuation: $2,399 gross (approx. 9,300 PLN gross) DOCUMENTATION AND EXPERT APPRAISAL: Certificate: The diamond comes with a Certificate from an Appraiser of the Polish Gemmological Society (Diamond Sky, a company that has been operating on the Polish market for 30 years) featuring a catalog photo and a QR code...
NATURAL COLORED DIAMOND 0.26 CT | CLARITY: SI1 | CUT: RADIANT Official appraiser’s valuation: $2,829 gross (approx. 11,300 PLN gross) DOCUMENTATION AND EXPERT APPRAISAL: Certificate: The diamond comes with a Certificate from an Appraiser of the Polish Gemmological Society (Diamond Sky, a company operating on the Polish market for 30 years) featuring a catalog photo and a QR code. Expert: Jan...
NATURAL COLORED DIAMOND 0.21 CT | CLARITY: SI1 | CUT: RADIANT Official appraiser’s valuation: $2,005 gross (approx. 8,000 PLN gross) DOCUMENTATION AND EXPERT APPRAISAL: Certificate: The diamond comes with a Certificate from an Appraiser of the Polish Gemmological Society (Diamond Sky, a company that has been operating on the Polish market for 30 years) featuring a catalog photo and a QR code...
NATURAL COLORED DIAMOND 0.21 CT | TEARDROP CUT | ESTIMATED VALUE: APPROX. 5,100 PLN GROSS The bargain starting price of just 750 PLN gross (+20% auction fee) is a fraction of the expert appraisal value—bidding starts at approximately 14% of the actual market value!DOCUMENTATION AND EXPERT APPRAISAL• Certificate: The diamond comes with a full Appraiser’s Certificate from the Polish Gemmo...
NATURAL COLORED DIAMOND 0.20 CT | HEART CUT | ESTIMATED VALUE: APPROX. 5,200 PLN GROSSDOCUMENTATION AND EXPERT APPRAISAL• Certificate: The diamond comes with a full certificate from an appraiser of the Polish Gemmological Society (Diamond Sky) featuring a catalog photo and a QR code.• Expert: Jan Karaszkiewicz – a distinguished expert on colored gemstones, a highly regarded diamond appra...
A UNIQUE RADIANT! Natural Diamond 0.25 ct FANCY DEEP YELLOWISH BROWN - Elite Canary Color, Radiant Cut. High clarity: VS1 | Official appraiser’s valuation: price approximately 10,022 PLN gross! A true rarity for connoisseurs—a natural diamond in a spectacular, dignified Fancy Deep Yellowish Brown color. This exceptional saturation grade is an elite “Canary Yellow” color with incredible...
NATURAL COLORED DIAMOND 0.20 CT | CLARITY: SI1 | CUT: HEART Official appraiser’s valuation: $1,919 gross (approx. 7,400 PLN gross) DOCUMENTATION AND EXPERT APPRAISAL: Certificate: The diamond comes with a Certificate from an Appraiser of the Polish Gemmological Society (Diamond Sky, a company that has been operating on the Polish market for 30 years) featuring a catalog photo and a QR code. ...
NATURAL COLORED DIAMOND 0.17 CT | CLARITY: VS1 | CUT: HEART Official appraiser’s valuation: $1,624 gross (approx. 6,500 PLN gross) DOCUMENTATION AND EXPERT APPRAISAL: Certificate: The diamond comes with a certificate from an appraiser of the Polish Gemmological Society (Diamond Sky) featuring a catalog photo and a QR code. Expert: Jan Karaszkiewicz—a distinguished expert on colored gemston...
1.51 ct SI2 Fancy Color Natural Diamond Gross Price: 22,671 PLN An exceptionally low starting price for a diamond of this weight. This offer is well below market rates—we ourselves would not be able to source this stone at such a low price. We are offering it at a starting price that is a fraction of its actual purchase value. NATURAL COLORED DIAMOND 1.51 CT | CLARITY: SI2 | CUT: EMERALD Off...
Gold ring with a 1.09 ct “Fancy Brown” natural diamond – IGI Certificate The subject of this auction is an elegant ring made of white gold, adorned with a center-set natural diamond featuring a unique “Fancy Brown” color. The stone features a modern Princess cut and an impressive weight of 1.09 carats. The ring comes with an original certificate from the renowned international gemolo...
NATURAL COLORED DIAMOND 0.31 CT | CLARITY: P1 | CUT: RADIANT Official appraiser’s valuation: $2,891 (approx. 11,000 PLN gross) DOCUMENTATION AND EXPERT APPRAISAL: Certificate: The diamond comes with a Certificate from an Appraiser of the Polish Gemmological Society (Diamond Sky, a company that has been operating on the Polish market for 30 years) featuring a catalog photo and a QR code. Expe...
NATURAL COLORED DIAMOND 0.26 CT | CLARITY: P1 | CUT: TEARDROP Official appraiser's valuation: 1,907 USD (approx. 7,300 PLN gross) DOCUMENTATION AND EXPERT APPRAISAL: Certificate: The diamond comes with a Certificate from an Appraiser of the Polish Gemmological Society (Diamond Sky) featuring a catalog photo and a QR code. Expert: Jan Karaszkiewicz – a distinguished expert on colored gemston...