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Diamond Ring Platinum Band Vintage Estate 1.40 TDW Old Mine
By Estate Jewelry
Located in East Brunswick, NJ
guaranteed) and set with old mine cut diamonds. The center diamond is .50 carat, two gems are .30 carat each
Category

Mid-20th Century Band Rings

Materials

Diamond, Platinum

Natural Old Mine Diamond Ring 14K Gold
By Estate Jewelry
Located in East Brunswick, NJ
natural old mine cut Diamonds are very clean VS2 clarity and H color totaling .50 carat. The top of the
Category

Mid-20th Century Cluster Rings

Materials

Diamond, 14k Gold, White Gold, Yellow Gold

Diamond Ruby Ring 14K Rose Gold Spiral Cocktail Retro Old Mine cut
By Estate Jewelry
Located in East Brunswick, NJ
carefully guaranteed). The center white gold bezel set 1.20 carats Old mine cut diamond is I2 clarity and I
Category

Mid-20th Century Art Deco Cocktail Rings

Materials

Diamond, Ruby, 14k Gold, Rose Gold

Old Mine Diamond Ring Platinum 2.05 TDW Vintage Engagement
By Estate Jewelry
Located in East Brunswick, NJ
This vintage ring is made in luxurious Platinum. The center old mine cut diamond is 1.45 carat of
Category

Vintage 1950s Engagement Rings

Materials

Diamond, Platinum

Antique 3.05 Carat Old Mine Cut Diamond & Emerald Platinum Engagement Ring
By Bella Rosa Estate Jewelers
Located in Santa Barbara, CA
Centering on a large 3.05 Carat, chunky and scintillating antique old mine cut diamond, this Art
Category

2010s Art Deco Engagement Rings

Materials

Diamond, Emerald, Platinum

Old Mine Diamond Sapphire Ring 14K White Gold Vintage
By Estate Jewelry
Located in East Brunswick, NJ
20 old mine cut diamonds plus two more diamonds on either side. The diamonds total 1.80 carat. They
Category

Vintage 1960s Cocktail Rings

Materials

Diamond, Sapphire, 14k Gold, White Gold

Old Mine Diamond Ring 14K White Gold Vintage 1.55 TDW
By Estate Jewelry
Located in East Brunswick, NJ
This vintage ring is made in solid 14K White Gold. Three center old mine cut diamonds total 1.20 of
Category

Vintage 1960s Cluster Rings

Materials

Diamond, 14k Gold, White Gold

Diamond Ring 14K Rose Gold Spiral 1.05 TDW Old Mine
By Estate Jewelry
Located in East Brunswick, NJ
Mine cut diamonds. There are 9 Earth mined white and fiery natural diamonds in this ring. The center
Category

Vintage 1950s Cluster Rings

Materials

Diamond, 14k Gold, Rose Gold

Mens Diamond Ring 14K Gold Band Old Mine .93TDW Vintage
By Estate Jewelry
Located in East Brunswick, NJ
Gold for the top and set with white and fiery Old mine cut diamonds. Nine diamonds (.25 center) are
Category

20th Century Cluster Rings

Materials

Diamond, 14k Gold, Yellow Gold

Diamond Ring Old Mine 14k White Gold Flower Vintage Cluster
By Estate Jewelry
Located in East Brunswick, NJ
and guaranteed). The center old mine cut diamond is .45 carat of VS2 clarity and J color. It is
Category

Mid-20th Century Cocktail Rings

Materials

Diamond, 14k Gold, White Gold

Old Mine Diamond Ring 14K White Gold Band 1.63 TDW Engagement
By Estate Jewelry
Located in East Brunswick, NJ
This stunning estate ring is finely crafted in solid 14K White gold and set with an old mine cut
Category

20th Century Engagement Rings

Materials

Diamond, 14k Gold, White Gold

Old Mine Diamond Ring 14K White Gold Art Deco .82 TDW
By Estate Jewelry
Located in East Brunswick, NJ
). Two center old mine cut diamonds are .20ct and .18ct. Six side diamonds are 0.08ct (4 gems) and 0.06ct
Category

Vintage 1930s Art Deco Bridal Rings

Materials

Diamond, 14k Gold, White Gold

Fancy Yellow & White Diamond Ring 14K Gold Platinum 1.28 TDW Old Mine
By Estate Jewelry
Located in East Brunswick, NJ
ring. Two old mine-cut diamonds are set in the center in a platinum mounting. One gem is a natural
Category

Early 20th Century Edwardian Wedding Rings

Materials

White Diamond, Yellow Diamond, 14k Gold, Platinum

Old mine Diamond Ring 14K White Gold Art Deco 1.30 TDW
By Estate Jewelry
Located in East Brunswick, NJ
). Three old mine cut diamonds total 1.30 carats; the center diamond is .50 carat and two diamonds are .40
Category

Early 20th Century Art Deco Three-Stone Rings

Materials

Diamond, 14k Gold, White Gold

Platinum Diamond Ring Old Cut Engagement
By Estate Jewelry
Located in East Brunswick, NJ
). The center old mine cut diamond is .59 carat. It is SI1 clarity and I color. Four smaller accent
Category

Vintage 1950s Engagement Rings

Materials

Diamond, Platinum

Antique Old Mine Diamond Emerald Sapphire Dome Engagement Ring
By Bella Rosa Estate Jewelers
Located in Santa Barbara, CA
' Cut Emeralds, Sapphires = 3.15 carats total Old Mine Cut Diamonds = 0.10 carats total Ring Size: 6.75
Category

2010s Art Deco Engagement Rings

Materials

Diamond, Emerald, Sapphire, Platinum

14K Yellow Gold Old Mine Round Cut 0.68 Carat GIA Estate Ring
Located in San Francisco, CA
-carat total weight. The center diamond in 0.68 - Carat G color VS2 in clarity Old-Mine Cut GIA
Category

20th Century American Cocktail Rings

Materials

Diamond, 14k Gold, Yellow Gold

Victorian Old Mine Cut Diamond Three Stone Gold Ring
Located in Los Angeles, CA
Victorian old mine cut diamond and black enamel three-stone gold ring circa 1890. * ABOUT THIS
Category

Antique 1890s Victorian Three-Stone Rings

Materials

Diamond, Gold, 18k Gold

Vintage 14k White Gold & Old Mine Cut Diamond Engagement Ring
Located in Philadelphia, PA
. Old Mine cut white diamond center set and flanked by 6 small round single cut diamonds. Accompanied
Category

20th Century Unknown Retro Engagement Rings

Materials

Diamond, White Gold

1.50 Carat Old Mine Cut Diamond Emerald Platinum Engagement Ring
Located in Beverly Hills, CA
A beautiful estate engagement ring featuring a large old mine cut diamond, approximately 1.50
Category

20th Century Art Deco Bridal Rings

Materials

Diamond, Emerald, Sapphire, Platinum

0.88 Old Mine Cut Diamond and Platinum Solitaire Style Ring
Located in Montgomery, AL
This platinum ring is an estate piece. This solitaire style ring features an antique Old Mine cut
Category

Vintage 1920s Art Deco Solitaire Rings

Materials

White Diamond, Platinum

Diamond Ruby Ring 20K Gold Vintage Estate Vintage
By Estate Jewelry
Located in East Brunswick, NJ
guaranteed) and set with natural Earth mined Rubies and Diamonds. The center old mine cut diamond is .25
Category

Late 20th Century Band Rings

Materials

Diamond, Ruby, Gold

Estate Art Deco Old Mine & European Cut Ruby & Diamond Pave Set Platinum Ring 6
Located in Miami, FL
Estate Art Deco Old Mine & European Cut Ruby & Diamond Pave Set Platinum Ring This previously
Category

Vintage 1930s Art Deco Fashion Rings

Materials

Diamond, Ruby, Platinum

Diamond Sapphire Ring Cluster Vinatge 18K White Gold Estate
By Estate Jewelry
Located in East Brunswick, NJ
total for all sapphires is 3.80 carats. Four old mine cut diamonds are .45 carat each! Four smaller old
Category

Vintage 1960s Cocktail Rings

Materials

Diamond, Sapphire, 18k Gold, White Gold

Antique Vintage Estate Old Miner Cut Diamond Rose Gold Ring
Located in Holland, PA
Antique Vintage Estate 18k Rose Gold 4ct Total Weight Old Miner Diamond Ring. Authentic antique
Category

Vintage 1930s American Cocktail Rings

Materials

Diamond, Rose Gold

Dainty Antique Turquoise Diamond Halo Ring with Fiery Old Mine Cut Diamonds
Located in Danvers, MA
turquoise cabochon surrounded by a diamond halo consisting of 11 small, super fiery old mine cut diamonds
Category

Antique Late 19th Century American Victorian Cluster Rings

Materials

Diamond, Turquoise, 14k Gold

Retro Ruby and Old Mine Diamond 14k Ring
Located in NEW ORLEANS, LA
timeless treasure. The ring is set with old mine and round cut diamonds that weigh approximately 0.50ct
Category

20th Century Retro Fashion Rings

Materials

Diamond, Ruby, 14k Gold

Antique 1.40 Carat Old Mine Cut Diamond Solitaire 18 Karat Yellow Gold Ring
Located in Scottsdale, AZ
Step back in time with this incredible vintage Old Mine Cut diamond that is over 100 years old. It
Category

Antique Late 19th Century Unknown Engagement Rings

Materials

Diamond, 18k Gold, Yellow Gold

Diamond Halo Ring in 14K Gold & Silver - Old Mine and Rose Cut Diamonds with Box
Located in Danvers, MA
fiery cushion cut old mine cut diamond center, surrounded by sparkly old rose cut diamonds. Just as
Category

20th Century European Early Victorian Cluster Rings

Materials

Diamond, Gold, Silver

Antique Old Mine Cut Diamond Trio Clover Motif Ring in 14 Karat Yellow Gold
Located in Scottsdale, AZ
Old Mine Cut diamonds set in a charming clover motif. Crafted in luxurious 14 karat yellow gold, this
Category

Antique 18th Century Unknown Contemporary Cocktail Rings

Materials

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

Antique Old Mine Cut Diamond Navette Ring 14 Karat Rose Gold 1.65 Carats Total
Located in Scottsdale, AZ
1.65 carats of natural Old Mine Cut diamonds (H-J / SI) pave set in a marquis shaped setting. There are
Category

Antique 19th Century Unknown Victorian Cocktail Rings

Materials

Diamond, 14k Gold, Rose Gold

Old European Diamond Ring Blue Enamel 14K White Gold
By Estate Jewelry
Located in East Brunswick, NJ
Old European cut diamond is .75 carat of VS1 clarity and G color! It is accented with 18 mine cut
Category

20th Century Solitaire Rings

Materials

Diamond, White Gold, Enamel

1.05 Carats Total Vintage Old Mine Cut Diamond Cluster Ring 14 Karat White Gold
Located in Scottsdale, AZ
Old Mine cut diamonds (I-J/ I1) bezel, prong and bead set in a variety of shapes and sizes in an
Category

Antique Early 19th Century Unknown Edwardian Cluster Rings

Materials

Diamond, Gold, 14k Gold, White Gold

Victorian Old Mine and Rose Cut Diamond Cluster Ring in Yellow Gold Circa 1850's
Located in Boston, MA
. Centered by a 0.25 carat old Mine cut diamond. Accented by a halo of pave set Rose cut diamonds of 0.32ctw
Category

Antique Mid-19th Century Victorian Cluster Rings

Materials

Diamond, 18k Gold, Yellow Gold

Diamond Ruby Ring 14K White Gold Vintage Estate
By Estate Jewelry
Located in East Brunswick, NJ
mined Rubies and Diamonds. Two bezel-set diamond in the center are .40 ct and .30 ct. One old mine cut
Category

Vintage 1970s Cocktail Rings

Materials

Diamond, Ruby, 14k Gold, White Gold

Men’s 1.20 Carat Old Mine Champagne Diamond and Sapphire Vintage Art Deco Ring
Located in Montreal, QC
Handsome Gent’s Old Mine Cut Diamond and Calibrated Sapphire Vintage Art Deco Gold Ring. Centering
Category

Mid-20th Century Art Deco Signet Rings

Materials

Diamond, Sapphire, Gold, 14k Gold, 18k Gold, 22k Gold, Yellow Gold

Diamond Amethyst Ring 14K Gold Band Vintage Estate
By Estate Jewelry
Located in East Brunswick, NJ
of great intensity and strong brilliance. Thirteen Old Mine cut diamonds are estimated to be VS-1
Category

Mid-20th Century Cocktail Rings

Materials

Amethyst, Diamond, 14k Gold, Yellow Gold

Edwardian Old European Diamond Ring 1.00 cttw 18K White Gold
By Estate Jewelry
Located in East Brunswick, NJ
Edwardian Old European Diamond Ring 1.00 cttw 18K White Gold This gorgeous antique ring from
Category

Early 20th Century Edwardian Cocktail Rings

Materials

Diamond, 18k Gold, White Gold

Vintage Art Deco 0.23ct OLD Mine Cushion Cut Diamond Engagement Ring Palladium
Located in New York, NY
or Promise ring with estimated 0.17ctT OLD MINE CUSHION Center diamond in G-H color, SI clarity
Category

Vintage 1930s Art Deco Engagement Rings

Materials

Diamond, Palladium

Sapphire Old European Diamond Ring 14k White Gold
By Estate Jewelry
Located in East Brunswick, NJ
Sapphire Old European Diamond Ring 14K White Gold This vintage ring is crafted in solid 14K White
Category

20th Century Band Rings

Materials

Diamond, Sapphire, White Gold

3.88 Carat Total Three-Stone Old Mine Cut Diamond Elongated 14 Karat Gold Ring
Located in Scottsdale, AZ
absolutely radiates on the finger and fills it with sparkle from end to end. It features three Old Mine cut
Category

Antique 19th Century Unknown Contemporary Three-Stone Rings

Materials

Diamond, Gold, 14k Gold, Yellow Gold

Diamond Sapphire Ring Platinum Edwardian Antique C.1910s European Cut
By Estate Jewelry
Located in East Brunswick, NJ
1910s luxurious Platinum ring is set with diamonds and sapphires. The center old European cut diamond is
Category

Vintage 1910s Cocktail Rings

Materials

Diamond, Sapphire, Platinum

Platinum Antique Cushion Blue Sapphire & Old Mine Cut Diamond Ring GIA 5.66 CT.
Located in San Francisco, CA
Sapphire GIA Certificate 5201103617. Flanked by two old-mine cut diamonds weighing 1.16 Carat GIA
Category

20th Century American Art Deco Engagement Rings

Materials

Blue Sapphire, Diamond, Platinum

Edwardian 1.16ctw Old Mine Diamond Cluster Ring in 14K Yellow Gold, Platinum
Located in Boston, MA
carats of old mine cut diamonds in platinum, atop 14 karat yellow gold. Grading as G to I color, and VS
Category

Early 20th Century Edwardian Cluster Rings

Materials

Diamond, 14k Gold, Yellow Gold, Platinum

Natural Diamond Ring European cut 18K White Gold Vintage 2.79 TDW
By Estate Jewelry
Located in East Brunswick, NJ
Natural Diamond Ring European cut 18K White Gold Vintage 2.79 TDW This stunning vintage ring is
Category

20th Century Cocktail Rings

Materials

Diamond, 18k Gold, White Gold

Vintage Enamel Flower Ring Mine Diamond 14k Yellow Gold Sz 4.75 Estate Jewelry
Located in Torrance, CA
bloom and a sparkling old mine cut diamond to the center, the ring makes a bold statement on the hand
Category

Mid-20th Century Unknown Modern Cocktail Rings

Materials

White Diamond, Diamond, Enamel, Yellow Gold, 14k Gold, Gold

Victorian GIA No-Heat Burmese Pink Sapphires & Old Mine Diamond 16KY Gold Ring
Located in New York, NY
Victorian English GIA 1.80ctw No-Heat Burmese Pink Sapphires & Old Mine Diamond Double Rows
Category

Antique 1890s English Victorian Wedding Rings

Materials

Pink Sapphire, Diamond, Gold

Edwardian Crossover GIA 1.10ct Ruby & Old Mine DIAMOND Three Stone 14K Gold Ring
Located in New York, NY
Edwardian Antique Crossover GIA 1.10ct Ruby & Old Mine Cushion DIAMOND Three Stone 14K Gold Ring A
Category

Antique 1890s European Edwardian Cluster Rings

Materials

Ruby, Diamond, 14k Gold

Art Deco Diamond Ring Flower Vintage Platinum 2.00 TDW Engagement
By Estate Jewelry
Located in East Brunswick, NJ
. The center Old Mine cut Diamond is 1.20 carat of VS2 clarity and J color. Two smaller bezel-set old
Category

Mid-20th Century Art Deco Engagement Rings

Materials

Diamond, Platinum

1.60 Carat Burma NO HEAT Ruby GIA and Old Mine Diamond Vintage Gold Ring
Located in Montreal, QC
Simply Beautiful! Finely detailed GIA NO HEAT Burma Ruby and Diamond Vintage Antique Gold Ring
Category

Antique Late 19th Century Neoclassical Cocktail Rings

Materials

Diamond, Ruby, Gold, 18k Gold, Yellow Gold

Art Deco Diamond Ring 14K Gold Geometric Vintage 1.58 TDW
By Estate Jewelry
Located in East Brunswick, NJ
(carefully tested and guaranteed). The very ornate and millgrained top of the ring is studded with old mine
Category

Vintage 1930s Cocktail Rings

Materials

Diamond, 14k Gold, White Gold

Antique 1890's Victorian 2.25ct Old Mine Diamonds 2 Rows 18K Wedding Band Ring
Located in New York, NY
ring, twelve claw set old brilliant mine cut diamonds, approximate diameter from 2.9 to 3.8mm, further
Category

Antique 1890s English Victorian Wedding Rings

Materials

Diamond, 18k Gold, Yellow Gold

Diamond Ring Solitaire with Accents Vintage 18K Gold Band 1.08 TDW
By Estate Jewelry
Located in East Brunswick, NJ
natural Old mine cut diamond in the center and two single cut diamonds on the sides. The center gem is
Category

Mid-20th Century Solitaire Rings

Materials

Diamond, 18k Gold, White Gold

Diamond Ring Flower 14K Gold Cocktail Vintage 4.07 TDW
By Estate Jewelry
Located in East Brunswick, NJ
color. 8 more Old mine cut diamonds total 1.61 carat of VS2-SI1 clarity and H color. The total diamond
Category

Early 20th Century Art Deco Cocktail Rings

Materials

Diamond, 14k Gold, White Gold, Yellow Gold

Estate 2 Carat Diamond Bypass Ring
Located in Napoli, Italy
Beautiful Diamond Bypass Ring An 18K white gold bypass ring, set with two old mine cut diamonds
Category

Mid-20th Century Engagement Rings

Materials

Diamond, 18k Gold

Estate Diamond & Sapphire With Side Diamonds Platinum Ring
Located in Dallas, TX
Platinum 1.36ct Old Mine Cut Diamond 0.74ctw Sapphire 0.12ctw Side Diamonds, Size 7.5 3.46 Grams
Category

Early 20th Century Engagement Rings

Materials

Diamond, Sapphire, Platinum

1.29 Carat Old Cut Diamond Engagement Ring 18 Karat in Stock
Located in Boca Raton, FL
18k Yellow Gold 1.29ctw Old Cut Diamond Engagement Ring Raymond Lee Jewelers in Boca Raton
Category

21st Century and Contemporary American Engagement Rings

Materials

Diamond, Gold, 18k Gold, White Gold

Georgian Emerald Diamond Opal Ring 14K Gold Antique, c.1820s
By Estate Jewelry
Located in East Brunswick, NJ
great intensity and strong brilliance. Nine old mine-cut diamonds range from VS2 to SI2 clarity and HI
Category

Antique 19th Century Cluster Rings

Materials

Diamond, Emerald, Opal, 14k Gold, Yellow Gold

Vintage GIA 1.00ct Old European Cut Diamond Engagement Ring, D Color, Platinum
Located in New York, NY
A stunning vintage estate diamond engagement ring, graced with a GIA-certified old European cut
Category

21st Century and Contemporary Unknown Art Deco Engagement Rings

Materials

Diamond, Platinum

Diamond Amethyst Ring 14K Gold Vintage Cocktail
By Estate Jewelry
Located in East Brunswick, NJ
guaranteed), and set with natural Earth mined Amethyst gemstones and diamonds. Twenty old cut amethysts are
Category

20th Century Cocktail Rings

Materials

Amethyst, Diamond, 14k Gold, Yellow Gold

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Estate Old Mine Cut Diamond Ring For Sale on 1stDibs

Find the exact estate old mine cut diamond ring you’re shopping for in the variety available on 1stDibs. Each design created in this style — which was crafted with great care and often made from gold, 14k gold and yellow gold — can elevate any look. You can easily find a 193 antique edition and 10 modern creations to choose from as well. Finding the perfect estate old mine cut diamond ring may mean sifting through those created during different time periods — you can find an early version that dates to the 19th Century and a newer variation that were made as recently as the 21st Century. An estate old mine cut diamond ring from Estate Jewelry, Antinori Fine Jewels and Prestigious New York Jeweler — each of whom created a beautiful version of this treasured accessory — is worth considering. See these pages for an old mine cut iteration of this accessory, while there are also old european cut cut and round cut cut versions available here, too. When shopping for an estate old mine cut diamond ring, you’ll find that there are less available pieces for unisex or men today than there are for women.

How Much is a Estate Old Mine Cut Diamond Ring?

The price for an estate old mine cut diamond ring starts at $550 and tops out at $269,500 with these rings, on average, selling for $4,000.

Finding the Right rings for You

Antique and vintage rings have long held a special place in the hearts of fine jewelry lovers all over the world.

No matter their origin or specific characteristics, rings are timeless, versatile accessories. They’ve carried deep meaning since at least the Middle Ages, when diamond rings symbolized strength and other kinds of rings were worn to signify romantic feelings or to denote an affiliation with a religious order. Rings have also forever been emblematic of eternity.

Over time, rings have frequently taken the form of serpents, which have long been associated with eternal life, health and renewal. Italian luxury jewelry house Bulgari has become famous for its widely loved Serpenti motif, for example, and its Serpenti ring, like the other accessories in the collection, began as an homage to jewelry of the Roman and Hellenistic eras. The serpent is now a popular motif in fine jewelry. Jewelry devotees have long pined for rings adorned with reptiles, thanks to antique Victorian rings — well, specifically, Queen Victoria’s illustrious engagement ring, which took the form of a gold snake set with rubies, diamonds and an emerald (her birthstone). Designs for Victorian-era engagement rings often featured repoussé work and chasing, in which patterns are hammered into the metal.

Engagement rings, which are reliably intimidating to shop for, are still widely recognized as symbols of love and commitment. 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

The most collectible antique engagement rings and vintage engagement rings are those from the Victorian, Edwardian and Art Deco eras. Named for the monarchies of the four King Georges, who in succession ruled England starting in 1714 (plus King William’s reign), antique Georgian rings, be they engagement rings or otherwise, are also coveted by collectors. Pearls, along with colored gemstones like garnets, rubies and sapphires, were widely used in Georgian jewelry. The late-1700s paste jewelry was a predecessor to what we now call fashion or costume jewelry

The Art Nouveau movement (1880–1910) brought with it rings inspired by the natural world. Antique Art Nouveau rings might feature depictions of winged insects and fauna as well as women, who were simultaneously eroticized and romanticized, frequently with long flowing hair. Art Deco jewelry, on the other hand, which originated during the 1920s and ’30s, is by and large “white jewelry.” White metals, primarily platinum, were favored over yellow gold in the design of antique Art Deco rings and other accessories as well as geometric motifs, with women drawn to the era’s dazzling cocktail rings in particular.

Whether you’re hunting down a chunky classic for a Prohibition-themed cocktail party or seeking a clean contemporary design to complement your casual ensemble, find an exquisite collection of antique, new and vintage rings on 1stDibs.

Questions About Estate Old Mine Cut Diamond Ring
  • 1stDibs ExpertApril 5, 2022
    Mine cut diamonds are up to 300 years ago. Mine cut diamonds were popular around the 18th century during Victorian times and are still in high demand today. You’ll find a wide selection of mine cut diamond jewelry on 1stDibs.
  • 1stDibs ExpertFebruary 22, 2021
    Because the old mine cut is no longer used on diamonds, diamonds with this cut are rare and so you can often get quite a lot of money for them. Nevertheless, it is still dependent on the quality of the individual diamonds and on the color, clarity, cut and carat number.
  • 1stDibs ExpertFebruary 22, 2021
    Old mine cut diamonds are usually worth less than old european cut diamonds. Because they are generally 10-15% less expensive, they are often larger than other cut diamonds for engagement rings.
  • Like any other diamond, an old mine cut diamond's worth depends on a variety of factors. These factors include the 4C's (color, clarity, cut, carat), the overall beauty and "make" of the stone, the demand, supply, etc. On average however, old mine cuts are typically priced slightly lower (around 5-10%) than modern cut diamonds.