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Vintage Tiffany & Co. Diamond Sapphire Irid Platinum Cocktail Ring
By Tiffany & Co.
Located in Holland, PA
Irid Platinum Sapphire Diamond Vintage Cocktail Ring by Tiffany & Co. With 1 Sapphire - 5mm x 4mm
Category

Vintage 1960s American Cocktail Rings

Materials

Diamond, Sapphire, Platinum

Antique Art Deco Irid Platinum Diamond Ring Navette 1920's 1930's US Size 5.25
Located in Greer, SC
Stunning antique art deco irid platinum and diamond ring, filigree in design with a navette shape
Category

Early 20th Century Unknown Art Deco Engagement Rings

Materials

Diamond, Platinum

Antique Art Deco Irid Platinum Diamond Bow Brooch Pin Wreath Circa 1920's 1930's
Located in Greer, SC
Elegant antique art deco bow brooch featuring dazzling diamonds set in bright platinum. A great
Category

Early 20th Century Unknown Art Deco Brooches

Materials

Diamond, Platinum

Antique Platinum 0.47 TCW Diamond Navette Cocktail Ring Size 6.25
Located in New York, NY
Ring Size: 6.25 Hallmark: 10%IRID.PLATINUM Item #: BR-1154-011624-01
Category

21st Century and Contemporary Cocktail Rings

Materials

Diamond, Platinum

Charming Round Cut Diamond Platinum Engagement Ring
Located in New York, NY
. The ring is stamped 10% IRID PLATINUM and weighs 2.6 grams. It is currently size 7 1/4, and can be
Category

20th Century Engagement Rings

Materials

Diamond, Platinum

1.70 Carat Chrysoberyl Cat's Eye Diamond Platinum Art Deco Ring
Located in Stamford, CT
Stamped: 10% Irid platinum 4.7 grams 7/16 x 11/16 inches
Category

Early 20th Century Engagement Rings

Materials

Chrysoberyl, Diamond, Platinum

1.70 Carat Purple Sapphire Diamond Platinum Three-Stone Engagement Ring
Located in Stamford, CT
top: 5.8mm Width at bottom: 2mm Stamped: 10% Irid Platinum
Category

Mid-20th Century Three-Stone Rings

Materials

Diamond, Sapphire, Purple Sapphire, Platinum

GIA Report Certified 1.58Ct Old Euro Cut Center Diamond Platinum Ring 1.92TCW
Located in New York, NY
center & 0.34 TCW side) Diamonds Face of Ring: 17.3 x 7.8 x 6.2 mm Size: 8.75 Hallmark: 10%IRID.PLATINUM
Category

20th Century Band Rings

Materials

Diamond, Platinum

.90 Carat Old European Cut Diamond Platinum Three-Stone Engagement Ring
Located in Stamford, CT
Stamped: 10% Irid Platinum Width at top: 6.3mm Height at top: 8mm Width at Bottom: 1.7mm
Category

Early 20th Century Engagement Rings

Materials

Diamond, Platinum

.50 Carat Diamond Solid Platinum Art Deco Engagement Ring
Located in Stamford, CT
weight .015ct each, f, vs Size 6.5 and sizeable Platinum Stamped: 10% irid Platinum 2.6 grams Width at
Category

Early 20th Century Engagement Rings

Materials

Diamond, Platinum

1.44 Carat Diamond Engagement Ring
Located in New York, NY
profile. Numbered 119, Stamped 10% IRID PLATINUM. Size 5 US
Category

20th Century American Art Deco Engagement Rings

Materials

Diamond, Platinum

Edwardian Diamond Platinum Ring
Located in Summerland, CA
Ladies Platinum pierced and scroll design with multiple diamonds. Ring is stamped 10% IRID
Category

Antique Early 1900s Edwardian Three-Stone Rings

Materials

Diamond, Platinum

1.35 Carat Transitional Cut Brown Diamond Platinum Art Deco Engagement Ring
Located in Stamford, CT
Platinum Stamped 10% irid Platinum 4.2 grams ¼ x ¾ inch
Category

Early 20th Century Engagement Rings

Materials

Diamond, Brown Diamond, Yellow Diamond, Platinum

Art Deco .84 Old European Cut Diamond Single and Baguette Platinum Ring
Located in Addison, TX
Type: Platinum Weight: 3.7 grams Hallmark: 10% IRID PLATINUM Engraving: none Width: 6 mm at head
Category

Vintage 1940s Unknown Art Deco Engagement Rings

Materials

Diamond, Platinum

Art Deco Platinum Diamond Engagement Ring 2.68ct
Located in Narberth, PA
An outstanding diamond engagement ring from the Art Deco (ca1930s) era! Crafted in platinum, the
Category

Vintage 1930s Art Deco Engagement Rings

Materials

Diamond, Platinum

Beautiful Vintage Diamond and Sapphire Navette Platinum Ring.
Located in San Francisco, CA
is a Size 6.5. The ring is stamped "5% Irid Platinum", and has been tested to be Platinum. There is
Category

Early 20th Century American Art Deco Engagement Rings

Materials

Diamond, Blue Sapphire, Platinum

5.28 Carat Emerald Cut Sapphire Diamond Art Deco Platinum Engagement Ring
Located in Stamford, CT
, VS Size 5 and sizable. Stamped and tested Irid Platinum. Stamped W.C.B. Please Note, we
Category

Early 20th Century Engagement Rings

Materials

Diamond, Sapphire, Blue Sapphire, Platinum

Marquise Diamond Calibre Emerald Platinum Art Deco Bracelet
Located in Stamford, CT
Stamped: 10% Irid Platinum 17.5 grams Please Note, we photograph each item as accurately as possible
Category

Early 20th Century Retro Bracelets

Materials

Diamond, Emerald, Platinum

GIA Certified .94 Carat Pink Sapphire Diamond Platinum Engagement Ring
Located in Stamford, CT
Size 6.5 and sizable Platinum 5.7 grams Hallmark: Hand Made PJ Stamped: 10% Irid Platinum Tested
Category

Mid-20th Century Engagement Rings

Materials

Pink Sapphire, Purple Sapphire, Sapphire, Diamond, Platinum

Art Deco 7.35 Carat Marquise Round Diamond Link Platinum Bracelet
Located in Stamford, CT
Stamped: 5% Irid Platinum 23.7 grams Bracelet: 7 Inches Width: 13.5mm Thickness/depth: 3.8mm Please
Category

Early 20th Century Link Bracelets

Materials

Diamond, Platinum

Midcentury Platinum Euro Cut Diamond Engagement Ring
Located in Lexington, KY
1950s, this ring is sure to turn heads! The ring is marked 10% IRID PLATINUM and a stylized SB
Category

Vintage 1950s American Engagement Rings

Materials

Diamond, Platinum

3.16ctw Diamond Cluster Ring, Platinum 100 IRID, Ring Size 6.5
Located in McLeansville, NC
Platinum 100 IRID. This size 6.5 ring features an impressive array of diamonds arranged in a dazzling
Category

21st Century and Contemporary Cluster Rings

Materials

Diamond, Platinum

2.61 Carat European Cut M-N/VS1 Diamond Vintage Art Deco Engagement Ring
Located in Miami, FL
diamond ring, set in platinum (stamped ‘10% IRID.PLATINUM’), containing 1 natural old european brilliant
Category

Vintage 1940s Art Deco Engagement Rings

Materials

Diamond, Platinum

Vintage Platinum Aquamarine Ring Solitaire Signed 10% Irid Plat US Sz 7.5
Located in Greer, SC
"Lady's aquamarine solitaire ring is made in platinum, stamped 10% Irid Plat, weighs 2.5
Category

Early 20th Century Unknown Solitaire Rings

Materials

Aquamarine, Platinum

1.77 Carat Basaltic Sapphire 1.86 Carat Diamond Platinum Marquise Cocktail Ring
Located in Jesmond, Newcastle Upon Tyne
the marks for platinum (10% irid platinum*). This fine dress ring is supplied with an independent
Category

Vintage 1920s Australian Cocktail Rings

Materials

Diamond, Sapphire, Platinum

GIA Certified Platinum 2.38CTW Diamond Engagement Ring
Located in Webster, NY
, accent diamond total carat weight; .20CTW Straight Baguette Cut Metal: Platinum Stamped: "10% IRID
Category

21st Century and Contemporary Engagement Rings

Materials

Diamond, Platinum

.31 Carat Diamond Platinum Swirl Ring
Located in Stamford, CT
-H VS approx..17cts Size 7.75 and sizable Platinum Stamped: 10% IRID PLAT 5.6 grams Width at top
Category

Mid-20th Century Fashion Rings

Materials

Diamond, Platinum

Art Deco Diamond Platinum Engagement Ring
Located in Stamford, CT
. total weight .03cts, G, VS Size 6 and sizable Platinum Tested: 10% irid Plat Width at top: 5.32mm Height
Category

Vintage 1920s Engagement Rings

Materials

Diamond, Platinum

Mid Century Platinum 1.73ct Diamond Engagement Ring GIA
Located in New York, NY
Ring Size: 9 Hallmark: 10% IRID 90 PLAT Metal: 89% Platinum Internal ID: BR-1474-121124-03
Category

Mid-20th Century Retro Engagement Rings

Materials

Diamond, Platinum

Blue Sapphire & Diamond Buckle Ring made in Platinum
Located in Webster, NY
Average Diamond Clarity: VVS-VS Blue Sapphire Carat Weight: 1.50CTW Metal: Platinum Stamped: "10% IRID
Category

20th Century Cocktail Rings

Materials

Diamond, Blue Sapphire, Platinum

.90 Carat Transitional Cut Diamond Platinum Engagement Ring
Located in Stamford, CT
Vintage 1940 handmade Platinum diamond engagement ring. One center diamond with 6 side diamonds. 1
Category

Vintage 1940s Engagement Rings

Materials

Diamond, Platinum

1920s Art Deco 11.32 Carat Diamond and Platinum Bracelet
Located in Jesmond, Newcastle Upon Tyne
the platinum mark (IRID PL) and has been independently tested using state of the art technology (Niton
Category

Vintage 1920s Link Bracelets

Materials

Diamond, Platinum

1.52 Carat Diamond Three-Stone Platinum Engagement Ring
Located in Stamford, CT
1940's late Art Deco transitional Ideal cut diamond platinum engagement Ring. EGL certified center
Category

Early 20th Century Engagement Rings

Materials

Diamond, Platinum

.40 Carat Diamond Art Deco Platinum Engagement Ring
Located in Stamford, CT
%. EGL certificate # US57042003D Size 6 and sizable Platinum Stamped: 10% irid Plat 3114 2.9 grams 5.5mm
Category

Early 20th Century Engagement Rings

Materials

Diamond, Platinum

GIA Certified 1.10 Carat Diamond Platinum Engagement Ring
Located in Stamford, CT
Platinum Stamped: 10%IRID PLAT 3.5 grams Width at top: 7mm Height at top: 6.2mm Width at bottom: 1.7mm
Category

Mid-20th Century Engagement Rings

Materials

Diamond, Platinum

Contemporary 1.35 TCW Carat Round Brilliant Diamond Platinum Engagement Ring
Located in Towson, MD
both color and clarity to ensure a seamless, sophisticated look. Crafted in platinum and stamped "IRID
Category

21st Century and Contemporary Contemporary Engagement Rings

Materials

Diamond, Platinum

4.60 Carat Oval Aquamarine Diamond Platinum Engagement Ring
Located in Stamford, CT
6 and sizable Platinum Stamped: 10% IRID PLAT 7.9 grams Width at top: 12.3mm Height at top: 9.4mm
Category

Mid-20th Century Engagement Rings

Materials

Aquamarine, Diamond, Platinum

GIA Certified 26.49 Carat Aquamarine Diamond Platinum Pendant Necklace
Located in Stamford, CT
. .5cts Platinum Stamped: IRID PLAT 11.8 grams Top to bottom: 47.6mm or 1 7/8 Inch Width: 17.5mm or 11/16
Category

Early 20th Century Pendant Necklaces

Materials

Aquamarine, Diamond, Platinum

Vintage Tiffany & Co. Platinum Diamond Star Pendant with 3.01 cts, 1979
By Tiffany & Co.
Located in New York, NY
Specifications: Brand: Tiffany & Co. Era: 1979 Hallmarks: TIFFANY & CO., 1979, IRID PLAT Metal: Iridium Platinum
Category

Vintage 1970s Contemporary Pendant Necklaces

Materials

Diamond, Platinum

EGL Certified 1.16 Carat Diamond Platinum Filigree Ring
Located in Stamford, CT
diamonds, G-H VS SI approx. .25cts Size 4.5 and sizable Platinum Stamped: 10% IRID PLAT Hallmark: Hardy
Category

Early 20th Century Cocktail Rings

Materials

Diamond, Platinum

Antique Filigreed Platinum 0.74ct Old European Cut Diamond Engagement Ring
Located in Houston, TX
metal was tested and determined to be platinum. Engraved with "IRID". In excellent condition. Antique
Category

Early 20th Century Unknown Engagement Rings

Materials

Diamond, Platinum

GIA Certified 6.07 Carat Sapphire Diamond Platinum Engagement Ring
Located in Stamford, CT
Diamonds, approx. total weight .34cts, G, VS Platinum 6.5 grams Tested: Platinum Stamped: 10% Irid Plat
Category

Vintage 1950s Engagement Rings

Materials

Diamond, Sapphire, Blue Sapphire, Platinum

1920s 1.24 Carat Diamond and Platinum Solitaire Engagement Ring
Located in Jesmond, Newcastle Upon Tyne
shank with a platinum mark (10% IRID PLAT). This impressive antique diamond set shoulder solitaire ring
Category

20th Century Unknown Solitaire Rings

Materials

Diamond, Platinum

GIA 1.20 Carat Montana Sapphire Diamond Platinum Engagement Ring
Located in Stamford, CT
cut diamonds, H VS-SI approx. .12cts Size 5.75 and sizable Platinum Stamped: 10% Irid Plat 3.0 grams
Category

Early 20th Century Engagement Rings

Materials

Diamond, Sapphire, Platinum

1.31 Carat Diamond Marquise Baguette Platinum Three Stone Engagement Ring
Located in Stamford, CT
weight .10cts, H, VS Size 6.75 and sizable 3.8 grams Platinum Tested: Platinum Stamped: 10% irid Plat
Category

Mid-20th Century Engagement Rings

Materials

Diamond, Platinum

Vintage Platinum 1.29ct H VS1 Emerald Cut Diamond Engagement Ring GIA
Located in New York, NY
: 12.9 x 8.6 x 5.4mm Ring Size: 7 Hallmark: .100 IRID 999 PLAT Metal: 89.4 Platinum, 9.8 Iridium BR
Category

Mid-20th Century Engagement Rings

Materials

Diamond, Platinum

GIA Certified 1.26 Orange Sapphire Diamond Platinum Engagement Ring
Located in Stamford, CT
.26 carats Size 7 and sizable Platinum Stamped: 10% IRID PLAT 3.1 grams Width at top: 7.66mm Height
Category

Early 20th Century Engagement Rings

Materials

Diamond, Sapphire, Platinum

Antique Tiffany & Co. Platinum GIA Certified Natural Pearl and Diamond Necklace
By Tiffany & Co.
Located in New York, NY
Length: 16" Hallmark: Platinum, 10% IRID Item #: BR-1574-042325-05
Category

20th Century Pendant Necklaces

Materials

Diamond, Natural Pearl, Platinum

Edwardian Sapphire Ring 1 Carat Solitaire Platinum Antique Original, 1900s
Located in Dearborn, MI
) Metal: Platinum Stamp: 100 IRID 900 PLAT We strive to provide the most accurate descriptions
Category

Antique Early 1900s Edwardian Solitaire Rings

Materials

Sapphire, Platinum

1.85 Carat Round Amethyst Diamond Platinum Swirl Cocktail Ring
Located in Stamford, CT
and sizable Platinum Stamped: 10% Irid Plat 9.5 grams Width at top: 17.2mm Height at top: 9.5mm
Category

Mid-20th Century Cocktail Rings

Materials

Amethyst, Diamond, Platinum

Art Deco Anniversary Band Original 1930's Platinum Antique Eternity Band
Located in Dearborn, MI
) Metal: Platinum Stamp: 10% IRID PLAT We strive to provide the most accurate descriptions possible
Category

Vintage 1930s Art Deco Wedding Rings

Materials

Platinum

EGL Certified .80 Carat Diamond Open Swirl Platinum Cocktail Ring
Located in Stamford, CT
Discover the EGL certified 1950's .80ct diamond open swirl platinum double ellipse cocktail ring
Category

Mid-20th Century Cocktail Rings

Materials

Diamond, Platinum

GIA Certified 2.49 Carat Sapphire Diamond Platinum Engagement Ring
Located in Stamford, CT
. .6cts Size 7 and sizable Platinum Stamped: 10% Irid Plat 5.6 grams Width at top: 8.1mm Height at top
Category

Mid-20th Century Engagement Rings

Materials

Diamond, Sapphire, Blue Sapphire, Platinum

GIA Certified .58 Carat Yellow Diamond Platinum Engagement Ring
Located in Stamford, CT
Size 5.75 and sizable Platinum Stamped: 10%IRID PLAT 3.0 grams Width at top: 5.5mm Height at top
Category

Mid-20th Century Engagement Rings

Materials

Diamond, Yellow Diamond, Platinum

GIA Certified 6.37 Carat Star Sapphire Diamond Platinum Ring
Located in Stamford, CT
blue with well defined center star. Set with two round brilliant cut side diamonds in a platinum
Category

Mid-20th Century Engagement Rings

Materials

Diamond, Sapphire, Star Sapphire, Platinum

1.23 Carat Mid-Century Modern Diamond Swirl Platinum Cocktail Ring
Located in Stamford, CT
, VS – SI Size 8.5 and sizable Platinum 8.0 grams Tested: Platinum Stamped: 10% Irid Plat Width at top
Category

Mid-20th Century Cocktail Rings

Materials

Diamond, Platinum

Vintage 1950s Sapphire and Emerald Diamond and Platinum Twist Ring
Located in Jesmond, Newcastle Upon Tyne
the interior of the shank with the mark for platinum (IRID PLAT). This impressive vintage gemstone
Category

Vintage 1950s Cocktail Rings

Materials

Diamond, Emerald, Sapphire, Platinum

Art Deco 1.56 Carat GIA Certified Diamond Platinum Engagement Ring
Located in New York, NY
This stunning platinum engagement ring from the Art Deco era, is centered with a sparkling GIA
Category

Early 20th Century Art Deco Engagement Rings

Materials

Diamond, Platinum

EGL Certified .75 Carat Diamond Three Stone Platinum Engagement Ring
Located in Stamford, CT
7.5 and sizable Platinum Stamped: 10% Irid Plat 3.4 grams Width at top: 6.1mm Height at top: 6.0mm
Category

Mid-20th Century Engagement Rings

Materials

Diamond, Platinum

EGL Certified .63 Carat Diamond Platinum Three-Stone Engagement Ring
Located in Stamford, CT
: Platinum Stamped: 10% irid Plat Hallmark: engraved 1953 4.4 grams Width at top: 5.8mm Height at top: 4.8mm
Category

Mid-20th Century Engagement Rings

Materials

Diamond, Platinum

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Irid Platinum For Sale on 1stDibs

Surely you’ll find the exact piece of irid platinum you’re seeking on 1stDibs — we’ve got a vast assortment for sale. Frequently made of platinum, gold and 18k gold, this item was constructed with great care. Our collection of these items for sale includes 1336 vintage editions and 78 modern creations to choose from as well. Making the right choice when shopping for an item from our selection of irid platinum may mean carefully reviewing examples of this item dating from different eras — you can find an early iteration of this piece from the 19th Century and a newer version made as recently as the 21st Century, both of which have proven very popular over the years. Finding an appealing choice in our collection of irid platinum — no matter the origin — is easy, but Tiffany & Co., Oscar Heyman and David Webb each produced a popular version that is worth a look. A round cut version of this piece has appeal, but there are also old european cut and baguette cut versions for sale. Most of our irid platinum for sale are for women, but there are 276 pieces available to browse for men.

How Much is a Irid Platinum?

On average, a piece of irid platinum at 1stDibs sells for $6,443, while they’re typically $11 on the low end and $195,000 for the highest priced versions of this item.

The Legacy of Diamond in Jewelry Design

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 ringsvintage engagement rings or Art Deco engagement rings

Shop antique and vintage diamond rings, diamond necklaces and other extraordinary diamond jewelry on 1stDibs.