Platinum Ruby & Diamond Double Heart Pendant Necklace
Located in New York, NY
Weight: 4.2 Grams Stone: Ruby, Diamonds Length: 18” Hallmark: 950, PT, RP Item #: BR-1830-031326-05
Diamond, Ruby, Platinum
Rhapsody Platinum 2.20ct Blue Zircon and Diamond Halo Ring
Located in New York, NY
Weight: 8.4 Grams Stone: Blue Zircon 2.20ct Stone: Diamond 0.11tcw Measurements: 11 x 10.85 x 7.5mm Size: 6.75 Hallmark: RHAPSODY, 950, PT Metal: Platinum Item #: BR-1830-031326-03
Diamond, Blue Topaz, Platinum
Platinum 16.17 ct Opal and Diamond Pendant Necklace
Located in Braintree, GB
Dimensions Length: 45 cm Weight: 19.72 grams Specifications Metal: Platinum 950 Era / Period: Modern Type: Pendant Necklace Hallmarks / Marks: Marked 950 PT Opal Cut: Pear-shaped c...
Diamond, Opal, Platinum
Diamond Key Amulet Pendant in Platinum on a Wheat Platinum Chain
Located in New York, NY
Details Provenance: Unknown Hallmarks: 950 Pt Metal: Platinum Stones: 55 round ideal-cut natural round diamonds, estimated weight 0.7 carats Height:1.5 inch Setting: Bezel and bright...
Diamond, Platinum
Carl Bucherer, Emerald and Diamond Ballerina Ring
By Carl F. Bucherer
Located in Chicago, IL
Ring size: 6 Metal: Platinum Stamp: PT CB 950 Gross weight: 7.70 grams Diamond Characteristics (insofar as the mounting permits): Color: E-F.
Diamond, Emerald, Platinum
Plat 1" American Flag Brooch, .85Ct. Diamond, 1.75 Carat Ruby & 1.88Ct. Sapphire
By Cellini
Located in New York, NY
Platinum setting Diamonds 0.85 carats Blue Sapphires 1.88 carats Rubies 1.75 carats Stamped 950 PT
Diamond, Ruby, Blue Sapphire, Platinum
Platinum and 18 Carat Yellow Gold Franco Link Chain Bracelet
Located in London, GB
The 6.7mm wide bracelet secures with a spring ring clasp, measures 7" in length and weighs 22.3 grams. Stamped 750 and 950 PT.
Gold, Platinum, 18k Gold, Yellow Gold
Platinum Fancy Cut Oval 6.70 Ct. Citrine and Accent Diamond Ring
Located in New York, NY
Measurements: 11.5 x 22 x 10 mm Ring Size: 7.5 Metal: Platinum Hallmark: 950 Pt, 12PT ITEM #: BR-1474-121124-16
Citrine, Diamond, Platinum
Platinum 0.83 Carat Diamond Engagement Ring
Located in New York, NY
Measures - size 7, ring top is 6.3mm wide. Marked 950 Pt 1017 Al. Weight 7.2 grams.
Diamond, Platinum
$15,800Sale Price|35% Off
20.57 carat Brazilian Aquamarine White Diamond Platinum Ring, Erich Zimmermann
By Erich Zimmermann
Located in Dallas, TX
Size 6.0 (Can be sized). Stamped 950 PT with the artist's signature hallmarks. About the Maker - Erich Zimmermann obtained the title of master silver and goldsmith in his hometown ...
Diamond, White Diamond, Aquamarine, Multi-gemstone, Platinum
Peter Suchy EGL Certified 1.01 Carat Diamond Engraved Platinum Engagement Ring
By Peter Suchy
Located in Stamford, CT
Size 7 and sizable Platinum Stamped: 950 Pt. 6.2 grams. 7/16 x 13/16 inch. Please Note, we photograph each item as accurately as possible.
Diamond, Platinum
AGL Certified 4.11 Carat Green Tourmaline Diamond Halo Platinum Cocktail Ring
Located in Stamford, CT
A truly unique ring. 1 modified custom cut bright vivid green Tourmaline, approx. total weight 4.11cts, VS, 12.79 x 8.00 x 6.36mm, natural color no heat and no enhancements, AGL ce...
Diamond, Tourmaline, Platinum
Cartier 'Solitaire 1895' Diamond Engagement Ring, Platinum 0.51 Carat
By Cartier
Located in London, GB
The stone is estimated by ourselves as a F colour and VVS2 clarity. Signed "Cartier" 950 Pt 0.51 with the serial number C004260 Date - Circa 2016 Finger size: US finger size 5 3/...
Diamond, Platinum
Diamond Circle Bow Necklace in Platinum
Located in Honolulu, HI
The necklace measures 29 mm in diameter. Stamped "950 PT" on the chain. Total weight 7.1 grams. This is a preowned necklace in excellent condition.
Diamond, Platinum
Henrich & Denzel Bauhaus Bracelet in Platinum with 1.20 Ctw of VVS Diamonds
Located in Miami, FL
Hallmarks: Stamped with the maker's logo HD for Henrich & Denzel, the platinum assay mark and signed, "HD TWIF .950 PT". Henrich & Denzel is a German-Swiss based jewelry designers f...
Diamond, White Diamond, Platinum
Audemars Piguet Platinum Manual Wind Wristwatch
By Audemars Piguet
Located in Stamford, CT
Platinum 37.9 grams Length: 37.36mm Width: 31.56mm Band width at case: 17mm Case thickness: 6.27mm Band: Genuine Alligator made in Italy - minor showcase wear Crystal: Glass Dial: Or...
Platinum
Tiffany & Co .95 Carat Diamond Platinum Rose Gold Heart Lock Pendant Necklace
By Tiffany & Co.
Located in Stamford, CT
Tiffany & Co Enchant diamond heart lock pendant necklace in platinum with 18k rose gold lock center and 195 round brilliant cut diamonds. 16 inch 18k white gold chain. 195 round bri...
Diamond, Gold, 18k Gold, Rose Gold, Platinum
Antique diamond rings, diamond tiaras and dazzling vintage diamond earrings are on the wish lists of every lover of fine jewelry. And diamonds and diamond jewelry are primarily associated with storybook engagements and red-carpet grand entrances — indeed, this ultra-cherished gemstone has a dramatic history on its hands.
From “A Diamond Is Forever” to “Diamonds Are a Girl’s Best Friend,” pop culture has ingrained in our minds that diamonds are the most desired, the most lasting and the most valuable gemstone. But what makes the diamond so special? Each stone — whether it’s rubies, sapphires or another stone — is unique and important in its own right. April babies might claim diamonds for themselves, but just about everyone wants this kind of sparkle in their lives!
There are several factors that set diamonds apart from other stones, and these points are important to our gem education.
Diamonds are minerals. They are made up of almost entirely of carbon (carbon comprises 99.95 percent; the remainder consists of various trace elements). Diamonds are the hardest gemstones, ranking number 10 on the Mohs Hardness Scale. Even its name, diamond, is rooted in the Greek adamas, or unconquerable. The only object that can scratch a diamond is another diamond. Diamonds are formed deep within the earth at very high temperatures (1,652–2,372 degrees Fahrenheit at depths between 90 and 120 miles beneath the earth’s surface) and are carried up by volcanic activity. Diamonds are quite rare, according to the Gemological Institute of America, and only 30 percent of all the diamonds mined in the world are gem quality.
In the 1950s, the Gemological Institute of America developed the 4Cs grading system to classify diamonds: clarity, color, cut and carat weight. Not all diamonds are created equal (there are diamonds, and then there are diamonds). The value of the diamond depends on the clarity (flawless diamonds are very rare but a diamond's value decreases if there are many blemishes or inclusions), color (the less color the higher the grade), cut (how the diamond’s facets catch the light, certain cuts of diamonds show off the stone better than others) and carat weight (the bigger, the better).
When you start shopping for a diamond engagement ring, always prioritize the cut, which plays the largest role in the diamond's beauty (taking the time to clean your diamond ring at least every six months or so plays a role in maintaining said beauty). And on 1stDibs, a range of buying guides can be found for those in the market for antique engagement rings, vintage engagement rings or Art Deco engagement rings.
Shop antique and vintage diamond rings, diamond necklaces and other extraordinary diamond jewelry on 1stDibs.