Gemstones auctions
Natural heart-shaped diamond, 0.30 ct, FANCY (fancy color), very high clarity VVS1—IGI certificate
685 EUR
Specifications and Identification:Type of item: Natural DiamondCertificate number: IGI 800601798 (dated June 1, 2026)Shape and Cut Style: Heart Modified BrilliantDimensions: 3.68 × 4.56 × 2.42 mmGrading Results:Carat Weight: 0.30 ctColor Grade: Natural Fancy Light YellowClarity Grade: VVS1 (Very Very Slightly Included—inclusions extremely difficult to see under 10x magnification)Cut Grade:...
Investment Diamond 0.30 ct, EMERALD cut, color F, Very High clarity VVS2 - IGI Certificate 797609541
685 EUR
A natural investment-grade diamond weighing 0.30 ct, certified by the internationally recognized, independent gemological institute IGI (Report No. 797609541). The stone features an emerald cut, a style that is elite and highly sought after by connoisseurs. The distinctive feature of this cut lies in its rectangular, stepped facets, which act like mirrors—they reveal any internal inclusions....
A natural diamond with a high carat weight of 0.46 ct, certified by the renowned international gemological institute IGI (Report No. 815675079).The stone is characterized by a high clarity grade of VS2 (Very Slightly Included). In jewelry and investment practice, this means the diamond is completely clear to the naked eye (eye-clean). Any microscopic internal features are absolutely invisible ...
A Unique Natural Fancy Intense Yellowish Brown Diamond – 0.61 ct | IGIThis listing features a unique, natural diamond weighing 0.61 ct, distinguished by its intense, exceptionally intriguing Fancy Intense Yellowish Brown color. This stone is perfect for those seeking distinctive elegance, an original color, and the noble beauty of natural diamonds. The diamond captivates with its distinctive...
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...
The subject of this offer is aunique natural black diamond weighing 1.51 ct, distinguished by its deep, elegant color and exceptionally striking marquise cut .Its distinctive, elongated shape lends it a noble character, while its intense black color catches the eye and highlights its unique style. This is a stone for those seeking original jewelry that stands out from classic diamonds. The mar...
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...
Investment Diamond 0.30 ct, EMERALD cut, color F, Very High clarity VVS2 - IGI Certificate 797610505
685 EUR
A natural investment-grade diamond weighing 0.30 ct, certified by the renowned international institute IGI (Report No. 797610505). The stone features an elite, rarely seen emerald cut. The architecture of this cut, with its wide, flat facets, immediately reveals any internal imperfections. For this reason, the offered stone—with the highest clarity grade of VVS2 (Very Very Slightly Include...
NATURAL COLORED DIAMOND 0.30 CT | CLARITY: P1 | CUT: TEARDROP A Unique Investment Opportunity: A “Fancy Vivid Yellow” Diamond with an Appraiser’s ValuationWe are pleased to present to you on the OneBid platform a unique collector’s item and investment opportunity—a natural diamond in the extremely rare and highly sought-after “Fancy Vivid Yellow” color variety.The stone comes wit...
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...
NATURAL COLORED DIAMOND 0.28 CT | CLARITY: P2 | CUT: RADIANT Official appraiser’s valuation: $1,661 (approx. 6,300 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 gemstones, a...
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...
NATURAL COLORED DIAMOND 0.34 CT | EMERALD CUT | ESTIMATED VALUE: APPROX. 8,000 PLN GROSS A unique investment opportunity on the OneBid platform! A natural diamond featuring the elegant, highly sought-after emerald cut and a unique fancy color. With bidding starting at just 1,000 PLN gross (+20% auction fee), this is a once-in-a-lifetime chance to purchase a certified gemstone for a fraction of...
Natural heart-shaped diamond, 0.31 ct, FANCY (fancy color), very high clarity VVS1—IGI certificate
685 EUR
Object Type: Natural DiamondCertificate number: IGI 800601789 (dated June 2, 2026)Shape and Cut Style: Heart BrilliantDimensions: 3.67 × 4.21 × 2.49 mmGrading Results:Carat Weight: 0.31 ctColor Grade: Natural Fancy Light Greenish YellowClarity Grade: VVS1 (Very Very Slightly Included—inclusions extremely difficult to see under 10x magnification)Cut Grade: Very GoodAdditional information ab...
NATURAL COLORED DIAMOND 0.27 CT | CLARITY: P1 | CUT: OVAL Official appraiser’s valuation: $1,845 gross (approx. 7,000 PLN gross) NOTE: The item presented is a 100% natural Fancy Color diamond. The exceptionally attractive starting price is due solely to the fact that our auction house bases its operations on direct, long-term international contracts at the source, bypassing any wholesale int...
NATURAL COLORED DIAMOND 0.23 CT | CLARITY: P1 | CUT: HEART Official appraiser’s valuation: $1,550 gross (approx. 6,000 PLN gross) DOCUMENTATION AND EXPERT APPRAISAL: Certificate: The diamond comes with a Certificate from 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 re...
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...
NATURAL COLORED DIAMOND 0.36 CT | CLARITY: P2 | CUT: CUSHION Official appraiser’s valuation: $3,247 gross (approx. 12,500 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...
NATURAL COLORED DIAMOND 0.30 CT | CLARITY: P1 | CUT: TEARDROP Official appraiser’s valuation: $3,247 gross (approx. 12,500 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 gems...
Natural Fancy Color Diamond, 1.59 ct, SI2. Gross price: 22,671.36 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 1.59 CT | CLARITY: SI2 | CUT: EMERA...
NATURAL COLORED DIAMOND 0.29 CT | CLARITY: P1 | CUT: TEARDROP Official appraiser’s valuation: $1,907 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 0.31 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 0.29 CT | CLARITY: P1 | CUT: CUSHION Official appraiser’s valuation: $2,337 (approx. 9,000 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 gemstones, ...
NATURAL COLORED DIAMOND 0.16 CT | CLARITY: SI2 | CUT: HEART Official appraiser’s valuation: $1,046 gross (approx. 4,100 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...
NATURAL COLORED DIAMOND 0.22 CT | CLARITY: P1 | CUT: RADIANT Official appraiser’s valuation: $1,378 gross (approx. 5,300 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 gems...
Natural diamond. The diamond comes with a certificate from an appraiser of the Polish Gemmological Society, Diamond Sky, plus a catalog photo with a QR code. Jan Karaszkiewicz is a distinguished expert on colored gemstones, a highly regarded diamond appraiser, and serves as Secretary General of the Polish Gemmological Society. The diamond can serve as an investment or be set in a ring, which w...
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 0.26 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 0.29 CT | CLARITY: P1 | CUT: TEARDROP Official appraiser’s valuation: $2,091 gross (approx. 8,000 PLN gross) NOTE: The item presented is a 100% natural Fancy Color diamond. The exceptionally attractive starting price is due solely to the fact that our auction house bases its operations on direct, long-term international contracts at the source, bypassing any wholesale...
NATURAL COLORED DIAMOND 0.34 CT | CLARITY: P1 | CUT: RADIANT Official appraiser’s valuation: $1,673 (approx. 6,400 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 gemstones, a...
1.05 ct SI2 Fancy Color Natural Diamond | Gross Price: 17,948.16 PLN NATURAL COLORED DIAMOND 1.05 CT | CLARITY: SI2 | CUT: SQUARE EMERALD Official appraiser’s valuation: 4,674.00 USD (exactly 17,948.16 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 o...
NATURAL COLORED DIAMOND 0.22 CT | CLARITY: P1 | CUT: OVAL Official appraiser’s valuation: $1,845 gross (approx. 7,200 PLN gross) DOCUMENTATION AND EXPERT APPRAISAL: Certificate: The diamond comes with a Certificate from 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 regar...
NATURAL COLORED DIAMOND 0.21 CT | CLARITY: P1 | CUT: CUSHION Official appraiser’s valuation: $1,328 gross (approx. 5,100 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 gemsto...
A natural diamond with an investment weight of 0.40 ct, certified by the prestigious international gemological institute IGI (Report No. 813685024). The stone is distinguished by its high clarity grade of VS2 (Very Slightly Included), which in jewelry terminology means the diamond is completely eye-clean. Any internal micro-inclusions are 100% invisible without the use of specialized equipment...
NATURAL COLORED DIAMOND 0.25 CT | CLARITY: P1 | CUT: TEARDROP Official appraiser’s valuation: $2,312 (approx. 9,000 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 gemstones, ...
NATURAL COLORED DIAMOND 0.28 CT | CLARITY: P1 | CUT: TEARDROP Official appraiser’s valuation: $1,845 gross (approx. 7,100 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...
NATURAL COLORED DIAMOND 0.28 CT | CLARITY: P1 | CUT: CUSHION Official appraiser’s valuation: $2,091 gross (approx. 8,000 PLN gross) NOTE: The item presented is a 100% natural Fancy Color diamond. The exceptionally attractive starting price is due solely to the fact that our auction house bases its operations on direct, long-term international contracts at the source, bypassing any wholesale ...
NATURAL COLORED DIAMOND 0.33 CT | CLARITY: P1 | CUT: RADIANT Official appraiser’s valuation: $2,952 gross (approx. 11,200 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...
Natural diamond, 0.23 ct, P1; Gross appraisal value: approx. 6,300 PLN 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. Expert: Jan Karaszkiewicz—a distinguished expert on colored...
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 0.23 CT | CLARITY: P1 | CUT: TEARDROP Official appraiser’s valuation: $1,599 gross (approx. 5,700 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...
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...
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...
NATURAL COLORED DIAMOND 0.15 CT | CLARITY: SI2 | CUT: TEARDROP Official appraiser’s valuation: $984 gross (approx. 3,900 PLN gross) DOCUMENTATION AND EXPERT APPRAISAL: Certificate: The diamond comes with a Certificate from the Polish Gemmological Society (issued by Diamond Sky, a company operating on the Polish market for 30 years) featuring a catalog photo and a QR code. The certificate bea...
The subject of this auction is a magnificent and exceptionally striking natural tanzanite weighing an impressive 9.53 ct. The stone comes from the legendary, world-exclusive deposits in Tanzania and features a classic, geometricemerald cut that beautifully highlights the mineral’s subtle violet-blue color.The stone is factory-sealed in its original, unopened laboratory blister pack from the ...
NATURAL DIAMOND 0.62 ct - TEARDROP - SI2 - NATURAL FANCY DEEP BROWN ORANGE - IGI CERTIFICATE
1 027 EUR
NATURAL DIAMOND 0.62 ct - TEARDROP - SI2 - NATURAL FANCY DEEP BROWN ORANGE - IGI CERTIFICATE The subject of this auction is a unique natural diamond weighing an impressive 0.62 ct, cut in an elegant, timeless pear-shaped (Pear Modified Brilliant) cut. The stone is characterized by a rare, exceptionally saturated, and fiery color (Natural Fancy Deep Brown Orange) of entirely natural origin. The...
NATURAL COLORED DIAMOND 0.17 CT | CLARITY: SI2 | CUT: HEART Official appraiser’s valuation: $1,353 gross (approx. 5,200 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. ...
A One-of-a-Kind Investment Piece: A Massive Natural Ethiopian Opal, 20.60 ct, with Play of Color – IGE Certificate and Blister Pack An exceptional, spectacular collector’s piece that captivates with its massive weight and unique optical properties. The subject of this auction is a monumental, 100% natural opal (Natural Opal) with a rare weight of 20.60 ct. The stone is factory-sealed in it...
NATURAL COLORED DIAMOND 0.41 CT | CLARITY: VS2 | CUT: MODIFIED OVAL Appraiser’s net valuation: 4,560 USD (17,322.76 PLN net – as of September 20, USD exchange rate 3.79885) Official gross appraisal value: 5,608.80 USD (21,306.99 PLN gross – as of September 20, USD exchange rate 3.79885) DOCUMENTATION AND EXPERT APPRAISAL: Certificate: The diamond comes with a prestigious, internation...
NATURAL DIAMOND 0.56 ct - TEARDROP - SI2 - NATURAL FANCY INTENSE BROWNISH YELLOW - IGI CERTIFICATE
913 EUR
NATURAL DIAMOND 0.56 ct - TEARDROP - SI2 - NATURAL FANCY INTENSE BROWNISH YELLOW - IGI CERTIFICATE The subject of this auction is a unique natural diamond with an impressive weight of 0.56 ct, cut in an elegant pear-shaped (Pear Modified Brilliant) style. The stone is characterized by an exceptionally saturated, highly sought-after color: Natural Fancy Intense Brownish Yellow, of entirely natu...
A unique, highly sought-after collector’s item and a classic investment gemstone. The subject of this auction is a stunning, 100% natural emerald (Natural Emerald) weighing 1.09 ct, factory-sealed in its original, intact laboratory blister pack from the prestigious European institute Instituto Gemológico Español (IGE). The specimen presented here originates from Brazil—one of the most ...
Brazilian Gem: 1.12 ct Natural Emerald in a mixed oval cut – IGE certificate and blister pack A unique, valuable collector’s item and a classic gemstone of high market rarity. The subject of this auction is a beautiful, 100% natural emerald weighing 1.12 ct. The stone is factory-sealed in an original, unopened laboratory blister pack from the renowned European institute Instituto Gemológi...
NATURAL DIAMOND 0.31 ct - RADIANT - VVS1 - NATURAL FANCY BROWNISH YELLOW - IGI CERTIFICATE The subject of this auction is a luxurious natural diamond weighing 0.31 ct, cut in a rectangular shape with cut corners (Cut Cornered Rectangular Modified Brilliant / Radiant). The stone is characterized by a beautiful, unique, and completely natural color: Natural Fancy Brownish Yellow. The diamond boa...