GIA 1.99 Carat Old Mine Brilliant Cut Diamond Bezel Stud Platinum Earrings
Located in Stamford, CT
Two GIA certified old mine brilliant cut diamonds in simple handmade platinum bezel settings. 1 old mine brilliant cut diamond, approx. total weight 1.00cts, I, SI1, GIA certificate...
Diamond, Platinum
2.08ct H VVS1 Square Emerald Cut Diamond Platinum Engagement Ring
By Tobi Gem Setting
Located in London, GB
The magnificent stone is mounted in a four claw, open back setting accompanied by 5 round brilliant cut diamonds on either shoulder weighing a combined 0.29ct, all set in a fine plat...
Diamond, Platinum
AGL Certified Natural 1.41 Carat Green Sapphire Diamond Platinum Engagement Ring
Located in Stamford, CT
Circa 1950-1960 1 natural brownish green square Sapphire approx. total weight 1.41cts AGL certificate # 43593 6 straight baguette diamonds approx. total weight .34cts, F, VS Size 6+...
Diamond, Sapphire, Green Sapphire, Platinum
Tiffany Diamond Etoile Heart Charm Pendant
By Tiffany & Co.
Located in London, GB
Condition: Used (Very Good) Weight: 5.1 grams Dimensions: 15mm x 13.5mm x 6.5mm (excluding bail) Marked: ‘T & Co’ ‘750’ 'PT 950' Diamonds: Approx. 0.15 carats, Colour: G-H, Clarity: ...
Diamond, 18k Gold
Platinum Diamond Ring w Tanzanite 4.00ct, .50tdw
Located in Laguna Beach, CA
Ladies tanazanite and diamond ring with platinum setting. Stamped Pt 950 and weighs 6.9 grams. The tanzanite is a 4.00 carat oval shape, spectacular violet blue color.
Diamond, Tanzanite, Platinum
2.12ctw Round Diamond Solitaire Engagement Ring 18k Gold Platinum Size 6.5 GIA
Located in McLeansville, NC
Gemstone Information: - Natural Diamond - Carats - 2.12ct Cut - Round Brilliant Color - H Clarity - SI2 GIA - 5231247523 Metal: 18k Yellow Gold, 950 Platinum Weight: 3.7 Grams Sta...
Diamond, 18k Gold, Yellow Gold, Platinum
Harry Winston Diamond Brooch
By Harry Winston
Located in New York, NY
(Color: D-F, Clarity: IFVS2, 22 stones are GIA Certified) all set in platinum. Stamped HW, PT 950. Measurements: 52.8 x 30 x 13.5mm. Weight: 18.8 grams.
Diamond, Platinum
Oval Signet Ring - 950 Platinum with Monogram Engraving
By Victor Mayer
Located in Pforzheim, DE
Victor Mayer Signet Ring, PT 950 Platinum, Oval, approx. 14.0 * 11.0 mm with Monogram-Engraving About the creator Victor Mayer Victor Mayer is internationally renowned for elegant ...
Platinum
2.30 Carat Diamond Platinum Swirl Earrings
Located in Stamford, CT
Large sized platinum safety backs. 12 transitional cut round diamonds, G SI -I approx. 1.80cts 2 transitional cut round diamonds, G SI-I approx. .50cts Platinum Stamped: PT 950 15....
Diamond, Platinum
Peter Suchy 1.50 Carat Canary Yellow Diamond Gold Platinum Pendant Necklace
By Peter Suchy
Located in Stamford, CT
Pendant slides on chain. 16 inch chain. 1 natural fancy yellow radiant cut diamond 1.50cts, EGL certificate # US43246601D. 18 round diamonds approx. total weight .45cts, G, VS. Plat...
Diamond, Yellow Diamond, 18k Gold, Platinum, Gold, Yellow Gold
Peter Suchy 4.95 Carat Diamond Platinum Eternity Wedding Band Ring
By Peter Suchy
Located in Stamford, CT
Created in the Peter Suchy Workshop. 15 round Ideal cut diamonds, approx. total weight 4.95cts, .33ct each, E to F, VS1 to VS2 Size 6 and not sizable Platinum Tested: Platinum Stam...
Diamond, Platinum
EGL Certified .40 Carat Semi Bezel Channel Set Diamond Engagement Ring
Located in Stamford, CT
EGL certificate #US64571901D 6 full cut diamonds, approx. total weight .15cts, F, VS1 - SI1 Size 6 and sizable Platinum Stamped: FD PT 950 6.1 grams Width at top: 6.8mm Height at top...
Diamond, Platinum
Peter Suchy GIA Certified 1.60 Carat Star Ruby Diamond Platinum Dangle Earrings
By Peter Suchy
Located in Stamford, CT
Crafted in the Peter Suchy workshop. 2 oval cabochon purplish display asterism red star rubies, approx. 1.60cts GIA Certificate # 2181719410 2 old mine cut diamonds J-K SI2-I, appro...
Diamond, Ruby, Platinum
$10,600
Coral Cabochon Diamond ring
Located in New York, US
- Stamped pt 950 for platinum. - Coral Cabochon measuring approximately 19.75 x 19.83mm ( depth non measurable ) of orangey pink tint with white colour banding, small scratches and c...
Coral, Diamond, 18k Gold
Tiffany & Co. Diamond Key Pendant Necklace
By Tiffany & Co.
Located in London, GB
Condition: Used (Excellent) Weight: 4.4 grams Pendant Dimensions: 30mm x 9mm x 3mm Chain Length: 16 inches Diamonds: Approx. 0.30 carats, Colour: F-G, Clarity: VS Hallmarked: Platinu...
Diamond, Platinum
Cartier Destinee Cushion 1.15 cts H VS1 Halo Engagement Ring in Platinum
By Cartier
Located in San Diego, CA
Cartier Destinee Cushion Diamond Engagement Ring Style: Halo with Diamond Halfway on Shank Ref. number: N4746100 Certification: GIA 2215029799 Metal: Pt 950 Platinum Size: 6.25 ...
Diamond, Platinum
Platinum Vintage Diamond Fringed Knot Cluster Earrings, App. 1.88 TCW
Located in Fairfield, CT
The earrings have no posts, and omega style backs. Marks: PT 950 Dimensions: 1" long x 9/16" wide Weight: 9.7 gross dwt Condition: Surface scratches
Diamond, White Diamond, Platinum
Tiffany & Co. Platinum Diamond Bracelet
By Tiffany & Co.
Located in Flushing, NY
Platinum Diamond Bracelet Marked: TIFFANY & Co PT 950 1997 Approximate Dimensions: 18.5 cm (Length) 0.9 cm (Width) Approx. 8.82 (+ / -) Carats (Diamonds) 33.9 grams in weight. ...
Diamond, Platinum
Tiffany & Co Etoile 18K Gold & Platinum Diamond Earrings
By Tiffany & Co.
Located in Flushing, NY
Tiffany & Co Etoile 18K Gold & Platinum Diamond Earrings Marked: TIFFANY & Co 750 PT 950 Approximate Dimensions: 2 cm (Length) 1.8 cm (Width) Approx. 0.4 carat (Diamond) 17.2 grams...
Diamond, Gold, 18k Gold, Platinum
Platinum Cabochon Sapphire and Diamond Dome Ring
Located in Great Neck Plaza, NY
The intricate lattice-like structure creates beautiful dimension and vintage elegance, making it a true conversation piece. Signed and stamped "PT 950" on the inner shank. Featured i...
Diamond, Sapphire, Platinum
Men’s Tiffany & Co. The Charles Tiffany Setting Platinum Satin Finish Band Ring
By Tiffany & Co.
Located in Houston, TX
The metal was tested and determined to be 950 platinum. Engraved with "Pt 950". The "Tiffany & Co." trademark (or hallmark) can also be found on the item.
Platinum
Tiffany & Co. Elsa Peretti Platinum Rock Crystal Teardrop Pierced Dangle Earring
By Tiffany & Co.
Located in Houston, TX
The metal was tested and determined to be 950 platinum. Engraved with "Pt 950". The "Tiffany & Co." trademark (or hallmark) can also be found on the item.
Platinum
Tiffany & Co. 1.71 Carat F IF Diamond Platinum Ring
By Tiffany & Co.
Located in New York, NY
The small diamonds are 0.72ct F VS The setting is PT/950. The ring is a size 6, not sizable The ring weighs 8.4 grams.
Diamond, White Diamond, Platinum
Fancy Yellow Cushion Diamond 3-Row 1.88 Carat Orianne Designer Platinum Ring
Located in San Diego, CA
Fancy Cushion Diamond Ring Style: 3-Row Diamond Ring Metal: 950 Platinum, 9.91 grams Size / Measurements: Size 7, 10.7 mm wide TCW: 1.88 Carats Total Main Diamond: 1.37 Carats Cu...
Diamond, Platinum
EGL Certified 3.35 Carat Old European Diamond Platinum Stud Earrings
Located in Stamford, CT
Both stones have equally beautiful with matching brilliance. 1 Old European diamond, I-J VS2 approx. 1.63cts EGL Certified # 400162676D 1 Old European diamond, I-J SI approx. 1.72c...
Diamond, Platinum
Peter Suchy EGL Certified 1.60 Carat Round Diamond Platinum Pendant Necklace
By Peter Suchy
Located in Stamford, CT
Certified as H-I, near colorless. 1 round brilliant cut diamond, G-H I approx. 1.60cts EGL certificate # 055190370D Platinum Stamped: PT 950 2.7 grams Top to bottom: 3.8mm or .54 ...
Diamond, Platinum
1.65 Carat Diamond Platinum Art Deco Pendant Necklace
Located in Stamford, CT
Art Deco 1930's diamond pendant necklace. 22 transitioanl and baguette cut diamonds on a 16 inch chain. 12 transitional cut diamonds, H-I VS-SI approx. .35cts 7 straight cut baguet...
Diamond, Platinum
Tiffany & Co Channel Set Platinum Diamond Engagement Ring Round 1.03 ct F VVS2
By Tiffany & Co.
Located in San Diego, CA
Tiffany & Co Diamond Engagement Ring Style: Tiffany Setting with Channel-Set Diamond Band T&C Diamond Certificate: 31137748/N09240084 Metal: Platinum PT 950 Size: 6 - sizable TCW...
Diamond, Platinum
2.02 Carat Green Tourmaline Diamond Platinum Dangle Earrings
Located in Stamford, CT
Hinged chevron sections with bright full cut diamonds with two kite shaped green Tourmaline dangles in platinum. 2 kite shaped bright green Tourmaline, approx. total weight 2.02cts...
Diamond, Tourmaline, Platinum
Van Cleef & Arpels Diamond Cluster Platinum Earrings
By Van Cleef & Arpels
Located in Greenwich, CT
Stamped Van Cleef & Arpels, PT 950 (Platinum) NY. 55368. A delicate balance between design and the simplicity of the shapes combined with the use of Platinum to radiate sparkles all ...
Diamond, White Diamond, Platinum
Tiffany & Co 0.42ct Lucida Diamond (G/IF) Solitaire 950 Platinum Engagement Ring
By Tiffany & Co.
Located in MELBOURNE, AU
P06262027" (diamond certificate number) inscription Platinum 950 knife-edge setting is bearing a number & weight of diamond: "D.0.42ct" It's stamped PT 950 & hallmarked Total ...
Diamond, Platinum
Art Deco Ring Platinum Hand Made Natural Green Sapphire 1.08 carat and Diamond
Located in MADRID, ES
Ring size: 7 3/4 US/ EU 16.5 /56.50/18 mm Contrasts and Mark: Pt 950
Diamond, Green Sapphire, Platinum
Peter Suchy GIA 1.53 Carat Diamond Halo Octagonal Platinum Engagement Ring
By Peter Suchy
Located in Stamford, CT
The main diamond is sparkly and has blue florescence which makes it face up white. 1 round diamond, approx. total weight 1.53cts, I, SI1, GIA certificate #2175424377 16 round diamo...
Diamond, Platinum
Tiffany & Co. Platinum and Diamond Engagement Ring
Located in Washington Depot, CT
Hallmark: TIFFANY & CO PT 950 22637428 .36 CT. Very good condition, professionally polished.
Diamond, Platinum
Tiffany & Co Novo Platinum Diamond Engagement Ring
Located in Washington Depot, CT
Hallmark: TIFFANY & CO PT 950 22809245 .30 ct. Very good condition, professionally polished.
Diamond, Platinum
Peter Suchy GIA Certified .99 Carat Black Diamond Platinum Halo Pendant Necklace
By Peter Suchy
Located in Stamford, CT
The pendant was designed and crafted in the Peter Suchy workshop 1 natural fancy black diamond, I natural salt and pepper inclusions, approx. .99cts GIA Certificate # 2215574534 33 ...
Black Diamond, Diamond, Platinum
GIA .88 Carat Cornflower Blue Sapphire Diamond Halo Platinum Pendant Necklace
Located in Stamford, CT
Sapphire is certified simple heat only. 1 round gem blue fine Sapphire, approx. total weight .88cts, VS, 6.15 x 6.10ct, 39mm, GIA certificate # 5151412600, natural color simple heat...
Blue Sapphire, Diamond, Sapphire, Platinum
GIA Certified 1.30 Carat Burma Ruby Diamond Ring in Platinum
Located in Hong Kong, HK
These stunning stones are set in a band of PT 950 platinum, known for its durability and lustrous finish.
Diamond, Ruby, Platinum
GIA Certified 13.78 Carat Yellow Sapphire Diamond Platinum Pendant Necklace
Located in Stamford, CT
Gia Certificate # 2155513788 8 Old European cut H-I VS diamonds, Approximate .90 carats 22 round H-I VS diamonds, Approximate .08 carats 16 Inch Platinum Chain Platinum Stamped: Ch...
Diamond, Sapphire, Yellow Sapphire, Platinum
Tiffany & Co Elsa Peretti Diamond Stacked Band Rings, Platinum, Ring Size 5
By Elsa Peretti for Tiffany & Co.
Located in McLeansville, NC
. / 10 grams Stamps: Peretti Tiffany & Co PT 950 A Couple Of Things to Note: * This is a vintage item and may show signs of wear.
Diamond, Platinum
$7,998Sale Price|25% Off
Tiffany & Co Platinum Diamond Engagement Ring 0.85ct
By Tiffany & Co.
Located in SYDNEY, NSW
Metal: 950 Platinum Carat: 0.85ct Colour: H Clarity: VS1 Cut: Round Brilliant Cut Weight: 5.4 grams Engravings/Markings: Signed TIFFANY & Co PT 950 D 0.85ct 30008278.
Diamond, Platinum
Platinum Infinity Set Diamond Pendant Necklace #17782
Located in Washington Depot, CT
Approximate total diamond weight: .45 cts Diamond color: G-H Diamond clarity: SI1-I1 Chain length: 18" Pendant: 14.8mm X 8.4mm X 4.1mm Weight: 1.82 dwt/ 2.84 g Hallmark: PT 950 ...
Diamond, Platinum
Kwait Platinum 18K White Gold Marquis Diamond Dangle Earrings #17044
By Kwait
Located in Washington Depot, CT
Diamond color: H-I Diamond clarity: VS2 Size: 19 mm x 7 mm Weight: 2.5 dwt. / 4.0 gr. Stamped: PT 950 KWAIT Very good condition, professionally polished.
White Diamond, Platinum
Ladies Vintage Watch Bracelet in Platinum with Diamonds
By Unbranded
Located in New York, NY
Adorned with sparkling diamonds and crafted in platinum, this sophisticated piece blends timeless elegance with practical wearability, making it perfect for both everyday luxury and ...
Diamond, Platinum
Necklace in 18 Karat Gold, Platinum and Diamonds and 1.5 Carat Yellow Diamond
Located in Paris, FR
Necklace in 18 Carat white Gold, PT 950 Platinum and diamonds holding an Important Yellow Cushion Diamond sized 1.5 Carats.
Diamond, Yellow Diamond, 18k Gold, White Gold, Yellow Gold, Platinum
Vintage Platinum 2.03ct Diamond Solitaire Ring
Located in New York, NY
Weight: 8.5 Grams Stone: 2.03ct J-K I2 Diamond Measurements: 26.75 x 21.5 x 8.2mm Size: 7 Hallmark: PT 950 Item #: BR-1664-072925-07
Diamond, Platinum
$1,170Sale Price|40% Off
Platinum Pink Kunzite Ring
By Christopher Bilton
Located in 徳島市, JP
It really glows! Stamped Pt 950 inside. Recently completed brand new ring. 950 platinum from the UK Made in Japan
Kunzite, Platinum
Peter Suchy GIA 1.23 Carat Diamond Sapphire Halo Platinum Engagement Ring
By Peter Suchy
Located in Stamford, CT
GIA certified round center stone set in a pierced, hand engraved platinum 8 sided setting with a bright blue round Sapphire halo and round diamond accents. 1 round diamond, approx....
Diamond, Sapphire, Blue Sapphire, Platinum
Natalie K GIA 3.33 Carat Octagonal Purple Sapphire Diamond Platinum Ring
By Natalie K
Located in Stamford, CT
GIA certified 3.33ct deep rich purple all natural untreated center Sapphire, in a platinum setting with 2 trapezoid side diamonds and 22 round full cut diamonds. 1 octagonal cut ...
Diamond, Sapphire, Purple Sapphire, Platinum
GIA Certified 1.84 Carat Sapphire Diamond Platinum Art Deco Dangle Earrings
Located in Stamford, CT
Both GIA certified natural no heat. 2 octagonal blue sapphires, VS-SI approx. 1.84cts GIA Certificate # 2165687659 and # 216587761 2 shield cut diamonds, G VS .34cts 24 single cut d...
Diamond, Sapphire, Platinum
5.86 Carat Green Tourmaline Diamond Halo Platinum Gold Cocktail Ring
Located in Stamford, CT
AGL certified octagonal 5.86cts deep bright green tourmaline in a simple handmade Platinum and rose gold setting accented with natural pink diamonds and rose gold scroll inlay. 1 ...
Diamond, Pink Diamond, Tourmaline, 18k Gold, Rose Gold, Platinum, Gold
Platinum 1.65ct Diamond Heart Necklace MFG16-012826
By LB Exclusive
Located in Southampton, PA
Crafted in platinum and stamped Pt 950, this necklace carries a reassuring weight of 9.7 grams.Offered in estate condition, this Platinum 1.65 ct Diamond Heart Necklace comes with a ...
Diamond, Platinum
18k White Gold & Platinum Emerald and Diamond Earrings
Located in New York, NY
Weight: 12.5 Grams Stone: Diamond, Emerald 1.58tcw Measurements: 17.9 x 13.3 x 7mm Hallmark: E 1.58, 750 PT 950 Metal: 18k White Gold and Platinum Item #: BR-1738-110525-18
Diamond, Emerald, 18k Gold, White Gold, Platinum
Cellini Plat Fancy Colored 1.43Ct Pink 1.34Ct Yellow 1.53Ct Grey Diamond Ring
By Cellini
Located in New York, NY
Grey diamond = 1.53 carats Pink diamond = 1.43 carats Yellow diamond = 1.34 carats White diamonds =0.64 carats Size 6 Stamped PT 950 All facts our based on our 30+ years of gemologi...
Diamond, Yellow Diamond, Pink Diamond, Platinum
Hammerman Brothers 14.22Ct. Diamond, & 56.63Ct. Kunzite, Art Deco Style Pendant
By Hammerman Brothers
Located in New York, NY
Kunzite = 53.63 carats Diamonds 94 = 14.22 carats Stamped Hammerman PT 950 94 diamonds =14.22 carats
Diamond, Kunzite, Platinum
3.75 Carat Pear Shaped Diamond Platinum Dangle Drop Earrings
Located in Stamford, CT
Each with a row of 6 round cut diamonds totaling .48cts with two EGL certified pear shaped diamond at each end totaling 1.90cts. 2 round diamonds, approx. total weight 1.37cts, H –...
Diamond, Platinum
8.25 Carat Green Tourmaline White Yellow Diamond Art Deco Platinum Earrings
Located in Stamford, CT
GIA certificate # 2145009601 and # 1142009468 96 full cut diamonds, F, VS, approx. total weight .60cts 6 full cut diamonds, approx. total weight .66cts, F, VS 6 fancy yellow full cut...
Diamond, Yellow Diamond, Tourmaline, 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.