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1930s Old Mine Cut

EGL Certified .55 Carat Diamond White Gold Engagement Ring
EGL Certified .55 Carat Diamond White Gold Engagement Ring

EGL Certified .55 Carat Diamond White Gold Engagement Ring

Located in Stamford, CT

1930’s old mine cut diamond filigree engagement ring. EGL certified center stone with two single

Category

Early 20th Century Engagement Rings

Materials

Diamond, Gold, 14k Gold, White Gold

Antique Art Deco 1930s 1.56 Carat Old Mine Cut Diamond Engagement Ring
Antique Art Deco 1930s 1.56 Carat Old Mine Cut Diamond Engagement Ring

Antique Art Deco 1930s 1.56 Carat Old Mine Cut Diamond Engagement Ring

Located in New York, NY

Finely crafted in platinum with a GIA certified Old Mine cut Diamond weighing 1.56 carats, I color

Category

Vintage 1930s Art Deco Engagement Rings

Materials

Diamond, Platinum

Antique Art Deco 1930s 1.03 Carat Old Mine Cut Diamond Engagement Ring
Antique Art Deco 1930s 1.03 Carat Old Mine Cut Diamond Engagement Ring

Antique Art Deco 1930s 1.03 Carat Old Mine Cut Diamond Engagement Ring

Located in New York, NY

Finely crafted in platinum with a GIA certified Old Mine cut Diamond weighing 1.03 carats, F color

Category

Vintage 1930s Art Deco Engagement Rings

Materials

Diamond, Platinum

Antique Art Deco 1930s 1.47 Carat Old Mine Cut Diamond Engagement Ring
Antique Art Deco 1930s 1.47 Carat Old Mine Cut Diamond Engagement Ring

Antique Art Deco 1930s 1.47 Carat Old Mine Cut Diamond Engagement Ring

Located in New York, NY

Finely crafted in platinum with an Old Mine cut center Diamond weighing 1.47 carat, J color, VS

Category

Vintage 1930s Art Deco Engagement Rings

Materials

Diamond, Platinum

Antique Art Deco 1930s 1.62 Carat Old Mine Cut Diamond Engagement Ring
Antique Art Deco 1930s 1.62 Carat Old Mine Cut Diamond Engagement Ring

Antique Art Deco 1930s 1.62 Carat Old Mine Cut Diamond Engagement Ring

Located in New York, NY

Finely crafted in platinum with an Old Mine cut Diamond at the center weighing 1.62 carats, I color

Category

Vintage 1930s Art Deco Engagement Rings

Materials

Diamond, Platinum

Antique Art Deco 1930s 4.01 Carat Old Mine Cut Diamond Engagement Ring
Antique Art Deco 1930s 4.01 Carat Old Mine Cut Diamond Engagement Ring

Antique Art Deco 1930s 4.01 Carat Old Mine Cut Diamond Engagement Ring

Located in New York, NY

Finely crafted in platinum with a GIA certified Old Mine cut Diamond weighing 4.01 carats, L color

Category

Vintage 1930s Art Deco Engagement Rings

Materials

Diamond, Platinum

Antique Art Deco 1930s 2.50 Carat Old Mine Cut Diamond Engagement Ring
Antique Art Deco 1930s 2.50 Carat Old Mine Cut Diamond Engagement Ring

Antique Art Deco 1930s 2.50 Carat Old Mine Cut Diamond Engagement Ring

Located in New York, NY

Finely crafted in platinum with a GIA certified Old Mine cut Diamond weighing 2.50 carats, I color

Category

Vintage 1930s Art Deco Engagement Rings

Materials

Diamond, Platinum

Antique Art Deco 1930s 1.67 Carat Old Mine Cut Diamond Engagement Ring
Antique Art Deco 1930s 1.67 Carat Old Mine Cut Diamond Engagement Ring

Antique Art Deco 1930s 1.67 Carat Old Mine Cut Diamond Engagement Ring

Located in New York, NY

Finely crafted in platinum over 14K yellow gold with an Old Mine cut Diamond weighing 1.67 carats

Category

Vintage 1930s Art Deco Engagement Rings

Materials

Diamond, 14k Gold, Platinum

1930s platinum and old mine cut diamond dangly earrings with approx 8c diamonds
1930s platinum and old mine cut diamond dangly earrings with approx 8c diamonds

1930s platinum and old mine cut diamond dangly earrings with approx 8c diamonds

Located in London, GB

approximately 8 carats of Old Mine cut diamonds. Shaped as an elongated coil there is beautifully intricate

Category

Vintage 1930s French Art Deco Dangle Earrings

Materials

Diamond, Platinum

.82 Carat Old Mine Brilliant Cut Diamond Gold Art Deco Engagement Ring
.82 Carat Old Mine Brilliant Cut Diamond Gold Art Deco Engagement Ring

.82 Carat Old Mine Brilliant Cut Diamond Gold Art Deco Engagement Ring

Located in Stamford, CT

Art Deco 1930s Old Mine brilliant cut diamond gold engagement ring. This exquisite piece is a

Category

Early 20th Century Engagement Rings

Materials

Diamond, 18k Gold, White Gold, Gold

Art Nouveau 1930s 1.65 Carat Old European Mine Cut Diamond and Platinum Ring
Art Nouveau 1930s 1.65 Carat Old European Mine Cut Diamond and Platinum Ring

Art Nouveau 1930s 1.65 Carat Old European Mine Cut Diamond and Platinum Ring

Located in Berkeley, CA

This beautiful ring is a real stunner!1 The center diamond is aprox. 1.65 ct old European mine cut

Category

Vintage 1930s American Art Nouveau Engagement Rings

Materials

Diamond, Platinum

Art Deco GIA 1.01 carat old mine cut diamond platinum engagement ring
Art Deco GIA 1.01 carat old mine cut diamond platinum engagement ring

Art Deco GIA 1.01 carat old mine cut diamond platinum engagement ring

Located in Beverly Hills, CA

, centering a beautifully faceted old mine cut diamond whose soft glow radiates with vintage character

Category

Vintage 1930s Art Deco Engagement Rings

Materials

Diamond, Platinum

Art Deco 7.00ct Old Cut Diamond Bracelet, c.1930s
Art Deco 7.00ct Old Cut Diamond Bracelet, c.1930s

Art Deco 7.00ct Old Cut Diamond Bracelet, c.1930s

Located in London, GB

A fabulous late Art Deco period diamond and platinum bracelet! Seven opulent carats of old cut

Category

Vintage 1930s Unknown Art Deco Link Bracelets

Materials

Diamond, Platinum

Deco old mine cut diamond dangle earrings in gold and platinum
Deco old mine cut diamond dangle earrings in gold and platinum

Deco old mine cut diamond dangle earrings in gold and platinum

Located in Milano, MI

period 1930s c.a. - Old mine cut and rose cut diamonds for 0.50ct total c.a. - Dangle drop earrings with

Category

Vintage 1930s European Dangle Earrings

Materials

Diamond, Gold, Platinum

Vintage Art Deco Style Platinum Old Mine Diamond and Sapphire Cocktail Ring
Vintage Art Deco Style Platinum Old Mine Diamond and Sapphire Cocktail Ring

Vintage Art Deco Style Platinum Old Mine Diamond and Sapphire Cocktail Ring

Located in Great Neck, NY

. It holds beautiful old mine cut diamonds and a natural sapphire in the center. The ring sits low on

Category

Early 2000s Unknown Contemporary Cocktail Rings

Materials

Diamond, Sapphire, Platinum

Platinum Art Deco Diamond Stick Pin by Yard – 1930s – 1.50 Carats
Platinum Art Deco Diamond Stick Pin by Yard – 1930s – 1.50 Carats

Platinum Art Deco Diamond Stick Pin by Yard – 1930s – 1.50 Carats

Located in Philadelphia, PA

piece epitomizes the glamour and geometric elegance of the Art Deco period, featuring 26 Old Mine Cut

Category

Vintage 1930s Art Deco Brooches

Materials

Diamond, Platinum

Vintage Art Deco 1.70ct Diamond Ring Cluster 14k Gold Halo Engagement Bridal
Vintage Art Deco 1.70ct Diamond Ring Cluster 14k Gold Halo Engagement Bridal

Vintage Art Deco 1.70ct Diamond Ring Cluster 14k Gold Halo Engagement Bridal

Located in Torrance, CA

center set old mine cut diamond is estimated at 0.50 carats, accented with eight estimated 0.15 carat old

Category

Early 20th Century American Art Deco Cocktail Rings

Materials

Diamond, White Diamond, Gold, 14k Gold, White Gold

Art Deco GIA 1.96 carat diamond platinum engagement ring
Art Deco GIA 1.96 carat diamond platinum engagement ring

Art Deco GIA 1.96 carat diamond platinum engagement ring

Located in Beverly Hills, CA

This Art Deco ring from the 1930s features a 1.96 carat old mine cut diamond, certified by GIA

Category

Vintage 1930s Art Deco Engagement Rings

Materials

Diamond, Gold, 14k Gold, White Gold, Platinum

1.50 Carat Butterfly Diamond Gold Brooch
1.50 Carat Butterfly Diamond Gold Brooch

1.50 Carat Butterfly Diamond Gold Brooch

Located in Stamford, CT

Open work 1930's Butterfly diamond brooch. 55 old mine cut diamonds in a a 14k yellow gold

Category

Early 20th Century Brooches

Materials

Diamond, 14k Gold, Yellow Gold, Gold

Recent Sales

Vintage Art Deco 1930s Ring Old Mine Cut Diamond 0.10ct Rose Gold 18K and Pt
Vintage Art Deco 1930s Ring Old Mine Cut Diamond 0.10ct Rose Gold 18K and Pt

Vintage Art Deco 1930s Ring Old Mine Cut Diamond 0.10ct Rose Gold 18K and Pt

Located in Valencia, Comunidad Valenciana

Beautiful Art Deco 1930s ring made of 18 Karat rose gold and seen in platinum with central old mine

Category

Vintage 1930s Unknown Art Deco Dome Rings

Materials

Diamond, Rose Gold, Platinum

Vintage 1930s 1.83 Carat Old Mine Cut Diamond Art Deco Engagement Ring
Vintage 1930s 1.83 Carat Old Mine Cut Diamond Art Deco Engagement Ring

Vintage 1930s 1.83 Carat Old Mine Cut Diamond Art Deco Engagement Ring

Located in Boston, MA

Vintage 1930s Old Mine Cut Diamond Art Deco Engagement Ring - The center Old Mine cut diamond

Category

Vintage 1930s American Art Deco Engagement Rings

Materials

Diamond, Platinum

Art Deco Platinum Three-Stone 1 Carat Diamond Ring
Art Deco Platinum Three-Stone 1 Carat Diamond Ring

Art Deco Platinum Three-Stone 1 Carat Diamond Ring

Located in Napoli, NA

A Classic from 1930s. Old mine cut Diamond Platinum handmade ring. It is set with three old mine

Category

Early 20th Century Art Deco Three-Stone Rings

Materials

Diamond, Platinum

Art Deco 2 Carat Diamond Three-Stone Engraved Ring
Art Deco 2 Carat Diamond Three-Stone Engraved Ring

Art Deco 2 Carat Diamond Three-Stone Engraved Ring

Located in Napoli, NA

A Classic from 1930s. Old mine cut Diamond Yellow and white gold handmade ring. It features three

Category

Early 20th Century Art Deco Three-Stone Rings

Materials

Diamond, 18k Gold

Art Deco old mine cut diamond platinum engagement ring
Art Deco old mine cut diamond platinum engagement ring

Art Deco old mine cut diamond platinum engagement ring

Located in Beverly Hills, CA

This refined Art Deco ring from the 1930’s showcases a 0.53 carat old mine cut diamond framed by

Category

Vintage 1930s Art Deco Engagement Rings

Materials

Diamond, Platinum

1930s 3.76 Carats Old Mine Cut Diamonds Gold Cluster Earrings
1930s 3.76 Carats Old Mine Cut Diamonds Gold Cluster Earrings

1930s 3.76 Carats Old Mine Cut Diamonds Gold Cluster Earrings

Located in Napoli, NA

This Gorgeous Diamonds cluster earrings are set with an old mine cut diamond a little less 2 carat

Category

Mid-20th Century Italian Edwardian Stud Earrings

Materials

Diamond, White Diamond, 18k Gold

Old Cut Diamond Platinum Flower Cluster Dress Ring, circa 1930s
Old Cut Diamond Platinum Flower Cluster Dress Ring, circa 1930s

Old Cut Diamond Platinum Flower Cluster Dress Ring, circa 1930s

Located in London, GB

This one of a kind antique flower dress ring features a Victorian old cut diamond in the centre

Category

Vintage 1930s English Edwardian Cluster Rings

Materials

Diamond, Platinum

Art Deco Certified Greenish Yellow Old Cut Diamond Geometric Cocktail Ring 1930s
Art Deco Certified Greenish Yellow Old Cut Diamond Geometric Cocktail Ring 1930s

Art Deco Certified Greenish Yellow Old Cut Diamond Geometric Cocktail Ring 1930s

Located in Lisbon, PT

Old Mine-cut diamond, Portuguese, late 1930s. The Fancy colored diamond with a hue that hints both

Category

Vintage 1930s Portuguese Art Deco Cocktail Rings

Materials

Diamond, Yellow Diamond, Gold, 18k Gold, White Gold, Platinum

Vintage 1930s Cabochon Sapphire and Old Cut Diamond Gypsy Yellow Gold Ring
Vintage 1930s Cabochon Sapphire and Old Cut Diamond Gypsy Yellow Gold Ring

Vintage 1930s Cabochon Sapphire and Old Cut Diamond Gypsy Yellow Gold Ring

Located in London, GB

and adorned with two old cut diamonds each weighing around 0.30ct. It is fully made in 18kt yellow

Category

Vintage 1930s French Retro Dome Rings

Materials

Diamond, White Diamond, Sapphire, Blue Sapphire, 18k Gold, Yellow Gold

Art Deco Diamond an Sapphire Necklace, circa 1930s
Art Deco Diamond an Sapphire Necklace, circa 1930s

Art Deco Diamond an Sapphire Necklace, circa 1930s

Located in Wailea, HI

Art Deco Diamond an Sapphire Necklace Circa 1930's One Old Mine Marquise Cut Diamond Weighing .90

Category

Early 20th Century Unknown Art Deco Drop Necklaces

Materials

White Diamond, Blue Sapphire, Platinum

Antique Deco Diamond Ring 2.25 Carat Platinum Vintage Fine Jewelry Heirloom
Antique Deco Diamond Ring 2.25 Carat Platinum Vintage Fine Jewelry Heirloom

Antique Deco Diamond Ring 2.25 Carat Platinum Vintage Fine Jewelry Heirloom

Located in Torrance, CA

stylized square mount reflects the clean lines and geometric forms of the Art Deco era. The old mine cut

Category

Early 20th Century Unknown Art Deco Cocktail Rings

Materials

Diamond, Platinum

Vintage Art Deco 2.25 Carat Diamond Ring Platinum Fine Jewelry Heirloom
Vintage Art Deco 2.25 Carat Diamond Ring Platinum Fine Jewelry Heirloom

Vintage Art Deco 2.25 Carat Diamond Ring Platinum Fine Jewelry Heirloom

Located in Torrance, CA

stylized square mount reflects the clean lines and geometric forms of the Art Deco era. The old mine cut

Category

Early 20th Century Unknown Art Deco Cocktail Rings

Materials

Diamond, White Diamond, Platinum

Art Deco 4.80 carat diamond platinum 18k white gold drop earrings
Art Deco 4.80 carat diamond platinum 18k white gold drop earrings

Art Deco 4.80 carat diamond platinum 18k white gold drop earrings

Located in Beverly Hills, CA

These Art Deco earrings from the 1930’s showcase two old mine cut diamonds totaling approximately 4

Category

Vintage 1930s Art Deco Drop Earrings

Materials

Diamond, Gold, 18k Gold, White Gold, Platinum

Art Deco Diamond Platinum Brooch, 1930s
Art Deco Diamond Platinum Brooch, 1930s

Art Deco Diamond Platinum Brooch, 1930s

Located in Geneva, CH

Art Deco Diamond Platinum Brooch 1930S. Old mine cut and baguette cut Diamond. Dimensions: 5.90 x

Category

Vintage 1930s European Art Deco Brooches

Materials

Diamond, Platinum

Vintage 1935 Two-Tone Engagement Ring Old Mine Cut Diamond .04 Carat in 10k Gold
Vintage 1935 Two-Tone Engagement Ring Old Mine Cut Diamond .04 Carat in 10k Gold

Vintage 1935 Two-Tone Engagement Ring Old Mine Cut Diamond .04 Carat in 10k Gold

By Five Star Jewelry

Located in Austin, TX

This vintage beauty is is the perfect ring for lovers of 1930s charm. A sweet old mine cut diamond

Category

Vintage 1930s American Art Deco Engagement Rings

Materials

Diamond, 10k Gold, Yellow Gold, White Gold

Ladies Platinum Diamond Art Deco Wristwatch, circa 1930s
Ladies Platinum Diamond Art Deco Wristwatch, circa 1930s

Ladies Platinum Diamond Art Deco Wristwatch, circa 1930s

Located in Napoli, NA

A simply elegant 1930's Platinum and Diamond Wristwatch. Old mine cut diamonds are inlayed

Category

Mid-20th Century Art Deco Wrist Watches

Materials

Diamond, Platinum

Vintage Art Deco 5 Stone Diamond Ring Platinum Filigree Band Fine Jewelry
Vintage Art Deco 5 Stone Diamond Ring Platinum Filigree Band Fine Jewelry

Vintage Art Deco 5 Stone Diamond Ring Platinum Filigree Band Fine Jewelry

Located in Torrance, CA

. Five old mine cut diamonds are estimated at 0.15 carats each and total an estimated 0.75 carats

Category

Early 20th Century Unknown Art Deco Band Rings

Materials

Diamond, White Diamond, Platinum

Dangle Earrings Art Deco 1930s Diamond Old Mine Cut and Sapphires Platinum
Dangle Earrings Art Deco 1930s Diamond Old Mine Cut and Sapphires Platinum

Dangle Earrings Art Deco 1930s Diamond Old Mine Cut and Sapphires Platinum

Located in Valencia, Comunidad Valenciana

consists of two pieces in the form of articulated pears, at the bottom two old mine cut diamonds of

Category

Vintage 1930s Unknown Art Deco Dangle Earrings

Materials

Diamond, Sapphire, Platinum

Deep Red Ruby and Old Mine Cut Diamond 1930s Art Deco Ring 18 Carat Gold
Deep Red Ruby and Old Mine Cut Diamond 1930s Art Deco Ring 18 Carat Gold

Deep Red Ruby and Old Mine Cut Diamond 1930s Art Deco Ring 18 Carat Gold

Located in Hamilton, AU

high polish band rising into outcropped shoulders adorned with six glistening Old Mine Cut diamonds

Category

Vintage 1930s Unknown Art Deco Cluster Rings

Materials

Diamond, Ruby, Gold, 18k Gold, White Gold

1930s Platinum Brooch Set with Old Mine Cut Diamonds
1930s Platinum Brooch Set with Old Mine Cut Diamonds

1930s Platinum Brooch Set with Old Mine Cut Diamonds

Located in Paris, IDF

weighting about a carat each and a total of 8 carats of old cut diamonds around the middle ones

Category

Vintage 1930s French Brooches

Materials

Diamond, Platinum

Art Deco Cushion Cut Diamond Engagement Ring
Art Deco Cushion Cut Diamond Engagement Ring

Art Deco Cushion Cut Diamond Engagement Ring

Located in Beverly Hills, CA

an Old Mine Cushion Cut Diamond (EGL H color – VS1 clarity; measuring 6.58 x 6.25 x 3.80 mm). Set in

Category

Vintage 1930s American Art Deco Engagement Rings

Materials

Diamond, Platinum

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GIA Certified Three Stone Cushion Cut Diamond Sapphire Gypsy Ring 1.64 CTS 18KT
GIA Certified Three Stone Cushion Cut Diamond Sapphire Gypsy Ring 1.64 CTS 18KT

GIA Certified Three Stone Cushion Cut Diamond Sapphire Gypsy Ring 1.64 CTS 18KT

By Harbor Diamonds

Located in New York, NY

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Art Deco emerald and diamond ring, circa 1935.
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Art Deco emerald and diamond ring, circa 1935.

Located in London, GB

Art Deco emerald and diamond ring. Set to centre with an octagonal emerald-cut natural Muzo emerald in an open back rubover setting with a weight of 0.90 carats, flanked to top and b...

Category

Vintage 1930s Art Deco Cocktail Rings

Materials

Diamond, Emerald, Platinum

GRS Certified 5.88 Carat VIVID GREEN Emerald Diamond Ring
GRS Certified 5.88 Carat VIVID GREEN Emerald Diamond Ring

GRS Certified 5.88 Carat VIVID GREEN Emerald Diamond Ring

By Antinori Fine Jewels

Located in Chicago, IL

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Category

2010s Italian Modern Engagement Rings

Materials

Diamond, Emerald, Platinum

GIA 3.47ct Asscher Cut Diamond 3 Stone Engagement Wedding Platinum Ring
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GIA 3.47ct Asscher Cut Diamond 3 Stone Engagement Wedding Platinum Ring

Located in New York, NY

Timeless Estate GIA 3.47ct Asscher Cut Diamond Engagement Anniversary 3 Stone Platinum Ring. This Impressive ring will take your breath away! Once in a lifetime opportunity to own a...

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Early 2000s Engagement Rings

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Diamond, Platinum

Antique Art Deco Platinum Old European Diamond & Emerald Ribbon Engagement Ring
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Located in Montclair, NJ

This truly breathtaking antique diamond engagement ring was crafted in solid platinum during the early art deco period. This ring features a large old European cut diamond that's nea...

Category

Vintage 1920s Art Deco Engagement Rings

Materials

Diamond, Emerald, Platinum

Aquamarine Diamond and Blue Sapphire Art Deco Style Engagement Ring in 18K Gold
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Located in Bangkok, TH

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Located in Lexington, KY

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1920s Platinum Old European Cut Diamond Deco Engagement Ring 1 ct+ w/ appraisal
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1920s Platinum Old European Cut Diamond Deco Engagement Ring 1 ct+ w/ appraisal

Located in Lexington, KY

This is a stunning, bright white, European cut diamond engagement ring, made in platinum, from the 1920s. The centerstone of this ring is a .66 carat, G-H color, VS2 clarity Old Euro...

Category

Vintage 1920s Engagement Rings

Materials

Diamond, Platinum

Diamond Floral Brooch in Platinum
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Diamond Floral Brooch in Platinum

Located in New York, NY

Diamond Floral Brooch in Platinum This Brooch takes the form of a stylized flower, gracefully rendered in platinum and adorned with a dazzling array of round brilliant, baguette, an...

Category

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Materials

Diamond, Platinum

Sophia D. S Deco Ring with Emerald and Diamond
Sophia D. S Deco Ring with Emerald and Diamond

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By Sophia D

Located in New York, NY

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Located in Lexington, KY

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Located in Napoli, IT

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Edwardian Ruby & Marquise Diamond Ring

Edwardian Ruby & Marquise Diamond Ring

Located in Wilmslow, GB

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1930s Old Mine Cut For Sale on 1stDibs

Find the exact 1930s old mine cut you’re shopping for in the variety available on 1stDibs. Frequently made of Platinum, Gold and 18k Gold, this item was constructed with great care. For this particular piece, are consistently popular carat weights. A 1930s old mine cut from Shreve & Co. — each of whom created a beautiful version of this treasured accessory — is worth considering. Today, if you’re looking for an old mine cut version of this piece and are unable to find the perfect match, our selection also includes old european cut alternatives. There aren’t many items for men if you’re seeking a 1930s old mine cut, as most of the options available are for women and unisex.

How Much is a 1930s Old Mine Cut?

The price for a 1930s old mine cut starts at $495 and tops out at $110,000 with these rings, on average, selling for $7,367.

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.