Diamond Pendant Platinum Curved Trilliant Diamonds
Located in Stamford, CT
Platinum Stamped: PT 900 Bracelet/Chain: 16 inch plus 3-inch extension Total length: 19 inches
Early 2000s Pendant Necklaces
Diamond, Platinum
Diamond Pendant Platinum Curved Trilliant Diamonds
Located in Stamford, CT
Platinum Stamped: PT 900 Bracelet/Chain: 16 inch plus 3-inch extension Total length: 19 inches
Diamond, Platinum
Platinum 0.66ct Diamond and Emerald Ring MF38-031726
By LB Exclusive
Located in Southampton, PA
This 900 platinum ring holds a 5.25-carat emerald, square in outline and carved at the center. Each
Diamond, Emerald, Platinum
Art Deco Platinum Bracelet with ca 13ct Diamonds
Located in Berlin, BE
An exceptional Art Deco bracelet crafted in 900 platinum, set with an impressive selection of high
Diamond, Platinum
Heart Shaped Rubellite Platinum and Diamond Necklace
Located in Great Neck Plaza, NY
pink-red hue of the rubellites. Crafted in platinum and stamped PT 900, this piece exudes timeless
Diamond, Rubelite, Platinum
Modern Ruby and Platinum Line Bracelet, 8.90 Carats
Located in London, GB
catch, mounted in 900 standard platinum. Manufacturers total given weight 8.90 carats, engraved on the
Ruby, Platinum
Timeless Elegance: Platinum Trilogy Sapphire & Diamond Ring
Located in München, DE
from solid 900 platinum, the ring offers a luxurious weight (approx. 7.0 grams) and durability to last
Diamond, Sapphire, Platinum
Platinum 3.50ct Star Sapphire and Diamond Baguette Halo
Located in New York, NY
Measurements: 28.7 x 20.5 x 19.4mm Size: 5.5 Hallmark: PT 900 Metal: Platinum Item #: BR-1727-102325-07
Diamond, Star Sapphire, Platinum
14.22ct Conch Pearl & Diamond Platinum Pendant - Tutti Frutti - Stunning!
Located in bangkok, TH
weighing a total of 14.22ct, the large pink being 10.02ct, set in 900 purity platinum. What gorgeous
Diamond, Pearl, Platinum
Antique Platinum Classic 2.1mm Stackable Band Ring Dated Engraving Inside
Located in Montclair, NJ
Material: Solid .900+ Platinum Total Weight: 2.90 Grams Overall Width: 2.1mm (0.08") (top of the
Platinum
Vintage Platinum 25" Long 6.8mm Wide Anchor Cable Link Heavy Chain Necklace
Located in Montclair, NJ
Material: Solid .900+ Platinum (tested with acid & x-ray) - no stamp Weight: 150.20 Grams Chain
Platinum
Mid-Century Platinum, Pearl, Emerald, & Diamond Cocktail Ring
Located in Philadelphia, PA
A fine Mid-Century pearl, emerald, and diamond cocktail ring. In .900 platinum. With a high-set
Diamond, Emerald, Pearl, Platinum
.30 Carat Diamond Swirl Platinum Engagement Ring
Located in Stamford, CT
Size 6.5 and sizable Platinum 3.8 grams Stamped: Pt 900 Tested: Platinum Hallmark: SA407263A/006
Diamond, Platinum
Oval Signet Ring - 950 Platinum with Monogram Engraving
By Victor Mayer
Located in Pforzheim, DE
exquisite collections. Reference: 51222/00/00/00/900 Material: Platinum 950PT Dimensions: approx. 14.0 x
Platinum
Art Deco Platinum Ladies Wristwatch with Diamonds
Located in Toledo, OH
platinum case surrounded by 1.75-carat of diamonds. The case is marked 900 platinum. It has a 17 jewel
Platinum
Round Brilliant Platinum Diamond Engagement Ring, GIA Certified
Located in Queens, NY
900 Platinum Diamond D Color, VVS2, Engagement Ring with GIA report, brightly polished, featuring a
Diamond, Platinum
1.52ctw Round Diamond Engagement Ring Platinum Size 7.25 GIA
Located in McLeansville, NC
- G Clarity - VS2 - SI1 Metal: 900 Platinum Weight: 3.7 Grams Stamps: Platinum, Hallmark Face Height
Diamond, Platinum
Trilogy 3 Diamond Drop Necklace in Platinum
Located in Honolulu, HI
: Diamond Pendant Chain Metal: 850 and 900 Platinum Total Weight: 7.2 Grams Pendant drops: 17mm Chain
Diamond, Platinum
.30 Carat Sapphire Diamond Platinum Engagement Ring
Located in Stamford, CT
, .36cts Size 8.25 and sizable Platinum Stamped: 900 PLAT 3.0 grams Width at top: 9.7mm Height at top
Diamond, Sapphire, Platinum
Platinum Diamond Engagement Vintage Cocktail Style Ring
Located in Mount Kisco, NY
.900 platinum ring with its asymmetrical wide band and ornamental floral inspired diamond applique
Diamond, Platinum
$26,000Sale Price|20% Off
7.20 Carat Emerald Cut Diamond Eternity Band Ring Platinum
By Antinori Fine Jewels
Located in Chicago, IL
enhances the visual spread of the stones, creating a bold yet elegant look. Crafted in 900 platinum, the
Diamond, Emerald, Platinum
Vintage Platinum GIA Colombian Emeralad Diamond Cocktail Ring
Located in Houston, TX
grams Polished 900 Platinum polished Colombian Emerald & Diamonds Cocktail Ring. Engraved with
Diamond, Emerald, Platinum
Antuiqe Platinum 1.75ctw Old European Cut Diamond Halo Filigree Engagement Ring
Located in Houston, TX
Gender: Ladies Metal Type: 900 Platinum Ring Size: 6 Width: 1.45 mm Weight: 4.86 grams Ladies
Diamond, Platinum
26.43 ctw Mid-Century Cabochon Burmese Sapphire & Diamond Platinum Ring
Located in Tysons, VA
: Cocktail Ring Era / Style: Mid-Century Metal: Platinum Metal Purity: Plat-900 Setting Style: Prong Band
Diamond, Blue Sapphire, Platinum
Art Deco Platinum GIA Diamond Engagement Ring 1.03ct
Located in Narberth, PA
, and the inside of the shank is stamped "900 PLATINUM". The ring is accompanied by a GIA (Gemological
Diamond, Platinum
$1,499
H 0.92 in W 0.64 in L 15.75 in
Vintage Platinum .22ctw Pave Diamond Classic Cross Pendant 15.75" Chain Necklace
Located in Montclair, NJ
Diamonds - 0.22ctw (approx.) Material: Solid .900+ Platinum Weight: 4.10 Grams Chain Type: Cable Link
Diamond, Platinum
Modern Baguette Cut Diamond and Platinum Line Bracelet, 11.46 Carats
Located in London, GB
catch, mounted in 900 standard platinum. Manufacturers total given weight 11.46 carats, engraved on the
Diamond, Platinum
【Sculpted Geometry】South Sea Pearl Diamond Earrings in Platinum
Located in New York, NY
Color: White Luster: Aurora Accessories Metal: 10.3 g of 900 Platinum Other: 2.2 ct of SI Quality
Diamond, South Sea Pearl, Platinum
$2,498
H 1 in W 0.32 in L 17.5 in
Platinum 9.09ct Long Rectangular Tourmaline Diamond Pendant Adjustable Necklace
Located in Montclair, NJ
Clarity - 4.1mm - 0.27ct (exact) Total diamond weight: 9.09 (exact) Material: Solid .830+ Platinum
Diamond, Tourmaline, Platinum
Classic Platinum 0.60ctw Round Pave Diamond Stackable Wedding Band Ring
Located in Montclair, NJ
Clarity Total Carat Weight: 0.60 (approx.) Material: Solid .900+ Platinum Weight: 4.3 Grams Ring Size
Diamond, Platinum
Antique Art Deco Platinum Old Cuts Diamonds Filigree Brooch
Located in Houston, TX
Weight: 4.79 grams Ladies filigreed vintage 900 platinum diamond brooch. Pre-owned in Very Good
Diamond, Platinum
Vintage Style Diamond And Platinum Floral Clip Earrings, 4.12 Carats
Located in London, GB
shepherd hooks on the backs, for adding night and day pendants (not included), mounted in platinum, stamped
Diamond, Platinum
Antique 1.04 Carat Diamond and Platinum Solitaire Ring Circa 1920
Located in Jesmond, Newcastle Upon Tyne
(.900 PLATINUM 100 IRID). This impressive 1920s diamond ring is supplied with an IDGL diamond grading
Diamond, Platinum
$2,298
H 1.3 in W 0.27 in L 17 in
Platinum 2.29ctw Tsavorite Diamond Long Drop Lariat Pendant Adjustable Necklace
Located in Montclair, NJ
(exact) Total diamond weight: 2.29ctw (exact) Material: Solid .850+ Platinum (chain) - .900 Platinum
Diamond, Tsavorite, Platinum
Platinum 3.98ctw Oval Fiery Colorful Opal Round Diamond Accents Ring
Located in Montclair, NJ
White Diamonds - 0.20ct (exact) Total Carat Weight: 3.98 (exact) Material: Solid .900 Platinum Weight
Diamond, Opal, Platinum
Platinum Square Cut Alternating Sapphire & Diamond 5 Stone Channel Band Ring
Located in Montclair, NJ
- 0.40ctw (exact) Total Carat Weight: 0.88 (exact) Material: Solid .900 Platinum Weight: 4.8 Grams Ring
Diamond, Sapphire, Platinum
EGL 12.03 Carat Diamond Bezel Set Platinum Tennis Necklace
Located in Stamford, CT
. total weight 12.03cts, G-H, SI2-I1., EGL certificate# 400200651D 900 Platinum Width at top: 5.2mm
Diamond, Platinum
Modern Three Stone Diamond and Platinum Ring, 1.60 Carat
Located in London, GB
total weight of 1.60ct, in claw setting, mounted in platinum, USA 900 platinum. This modern three-stone
Diamond, Platinum
Antique Platinum 1.78ct Old European Cut Diamond Three Stone Engagement Ring
Located in Houston, TX
Gender: Ladies Metal Type: Platinum Ring Size: 6 Width: 2.15 mm Weight: 7.47 grams Ladies 900
Diamond, Platinum
Platinum 0.50ctw Bar Set Alternating Round & Baguette Diamond Band Ring
Located in Montclair, NJ
- E/F Color - VVS1-VS1 clarity - 0.50ctw (approx.) Material: Solid .900+ Platinum (tested) - Stamped
Diamond, Platinum
5.27 Carat Emerald Cut Diamond Platinum Link Tennis Bracelet
Located in Stamford, CT
Platinum Tested: Platinum Stamped: PT 900 Hallmark: D527 Total Length: 7.25 inches Width: 5.36mm Thickness
Diamond, Emerald, Platinum
Large Tahitian Silver Grey Pearl Diamond Platinum Vintage Ring
Located in US
diamonds, approx. .09cts Total Ring Weight: 8.2g Ring Size: 6 and sizable Platinum Stamped: PLAT 900
Diamond, Cultured Pearl, Pearl, Platinum
Tiffany & Co. Platinum .20ct Diamond Solitaire Engagement Ring w/ Original Box
By Tiffany & Co.
Located in Montclair, NJ
White Diamond - 3.70mm - 0.20ct (exact) Material: Solid .900+ Platinum (tested) - Stamped PT950 Weight
Diamond, Platinum
Ladies Platinum 7.20ct Emerald Cut Diamond Full Eternity Wedding Band Ring
Located in Houston, TX
Gender: Ladies Metal Type: 900 Platinum Ring Size: 4 Width: 6.00 mm Weight: 9.12 grams
Diamond, Platinum
Men’s Platinum and 18K Yellow Gold Wedding Band Ring
Located in Houston, TX
grams One man's 900 platinum and 18K yellow gold, wedding band with a half-round shank. Engraved with
Gold, 18k Gold, Yellow Gold, Platinum
2ctw Diamond Engagement Ring Platinum Cathedral Band Size 6.75 GIA
Located in McLeansville, NC
- I Clarity - VS2 - SI1 Metal: 900 Platinum Weight: 7.4 Grams Stamps: Plat Face Height: 6.4 mm Rise
Diamond, Platinum
$2,920
W 0.6 in D 0.24 in L 0.79 in
Saphire Brilliant Pendant Platinum purpur violet incredible luminous Color
Located in Viena, Viena
approx. 19.5 x 15 x 6.5 mm, total weight approx. 6.8 grams, solid work in 900 platinum, elegant design
Diamond, Sapphire, Platinum
$4,990
H 1.45 in W 0.36 in L 6.01 in
Antique Art Deco Platinum Glycine 4.41tcw Diamond Handwind Ladies Watch
By Glycine
Located in New York, NY
/VS Material: 900 Platinum Size: 6" Weight: 27.9 Grams Item #: BR-1819-030426-01
Diamond, Platinum
Peter Suchy .93ct Pink Sapphire Octagonal Engagement Ring, Platinum
By Peter Suchy
Located in Stamford, CT
Platinum Stamped: PT 900 5.5 Grams Width at top: 6.0mm Height at top: 5.5mm Please Note, we photograph
Diamond, Sapphire, Pink Sapphire, Platinum
Vintage Platinum 4.70ctw Baguette Blue Sapphire & Diamond Domed Bombe Ring
Located in Montclair, NJ
Diamonds - 2.20ctw (approx.) Total Carat Weight: 4.70 (approx.) Material: Solid .900+ Platinum Weight
Diamond, Sapphire, Platinum
Platinum 0.77ctw Old European Cut Diamond 4 Prong Basket Classic Stud Earrings
Located in Montclair, NJ
Clarity Total Carat Weight: 0.77 (exact) Material: Solid .900 Platinum w/ Solid .950 Platinum Posts &
Diamond, Platinum
Vintage Platinum Gia Cambodia No Heat Sapphire Diamond Cocktail Ring
Located in Houston, TX
Gender: Ladies Metal Type: 900 Platinum Size: 5.5 Width: 1.55mm Weight: 3.71 grams Lady's
Diamond, Sapphire, Platinum
2.97 ctw Mid-Century Burmese Ruby & Diamond Platinum Three-Stone Ring
Located in Tysons, VA
: Platinum Metal Purity: Plat-900 Setting Style: Prong Band Style: Plain Finish: High Polish Gemstone
Diamond, Ruby, Platinum
Gemlok Platinum 0.55ctw Alternating Emerald & Round Cut Diamond Band Ring
By Gemlok
Located in Montclair, NJ
/H Color - VS1/VS2 clarity - 0.55ctw (approx.) Material: Solid .900+ Platinum (tested) - Stamped
Diamond, Platinum
Vintage Platinum 2.75ctw French Cut Diamond Hand Engraved Eternity Band Ring
Located in Montclair, NJ
White Diamonds Total Carat Weight: 2.75 (approx.) Material: Solid .900+ Platinum Weight: 3.86 Grams
Diamond, Platinum
2.52 Carat Diamond Emerald Onyx Platinum Engagement Ring
Located in Stamford, CT
: Platinum Stamped: Pt 900 9.9 grams Width at top: 20.33mm Height at top: 6.90mm Width at Bottom: 1.85mm
Diamond, Emerald, Onyx, Platinum
4.25 Carat Peridot Diamond Platinum Filigree Engagement Ring
Located in Stamford, CT
: Platinum Stamped: Pt 900 Hallmark: Mc 10.7 grams Width at top: 12.3mm Height at top: 9.4mm Width at Bottom
Diamond, Peridot, Platinum
1939 Art Deco Slim Wedding Anniversary Platinum Band Ring
Located in New York, NY
Width: 2.15 millimeter Hight 1.63mm Metal: Platinum Weight: 2.76 grams Hallmark: 900 PLAT, 100 IRID, the
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.
Ancient Egyptians referred to the vibrant stone as the “gem of the sun.”
There are many ways to showcase a diamond, from traditional prongs to a smooth, streamlined bezel. Here’s everything you need to consider.
The vintage bombé ring is bursting with color and timeless style.
Zircon is a magnificent and underrated natural gemstone that has been worn and adored for centuries.
Givers of fine gems enjoy surprise more than receivers, and women more than men. Find out what else our survey of 3,000 Americans revealed.
If diamonds don’t seem right, what about a magnificent sapphire, ruby or emerald?
Accounting for just 1 percent of all diamonds, these marvels of nature are exceedingly rare and gorgeously complex.
Learn about these antique jewelry styles, then choose a design that speaks to you.