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14K White Gold Old European Cut and Old Mine Cut Diamond Flower Ring
Located in Venice, CA
, and 0.9 of a carat. The eight Old Mine Cut diamonds range in size from 3 - 3.5 mm, and have a combined
Category

Vintage 1910s Unknown Edwardian Cocktail Rings

Materials

Diamond, Gold, 14k Gold, White Gold

Victorian 8.51 CTW Sapphire Diamond 18K Gold Silver Antique Bangle Bracelet
Located in Philadelphia, PA
edges bead set with old mine cut diamonds With additional rose and old mine cut diamonds bezel set in
Category

Antique 1880s Victorian Bangles

Materials

Diamond, Sapphire, Gold, 18k Gold, Yellow Gold, Silver

Art Deco Carved Rock Quartz Crystal, Onyx and Diamond Cufflinks
Located in Narberth, PA
. The rock crystal plaques have a 3-dimensional pyramidal cut and adorn a sparkling old Mine Cut diamond
Category

Vintage 1920s Art Deco Cufflinks

Materials

Diamond, Onyx, Rock Crystal, 15k Gold

EGL Certified 2.61 Carat Old Mine Diamond Yellow Gold Bezel Set Stud Earrings
Located in Stamford, CT
Old mine brilliant cut diamond stud earrings. 2 Old mine cut diamonds totaling 2.91cts, bezel tube
Category

21st Century and Contemporary Stud Earrings

Materials

Diamond, Gold, 18k Gold, Yellow Gold

Antique 18K TT Gold Bezel Blue Stone 1.1ctw Old Mine Cut Diamond Platter Ring
Located in Montclair, NJ
- 13.10x10.60mm (approx.) (10) Natural Genuine Diamonds - Old Mine Cut - Pave Set - G/I Color - VS2/SI2 Clarity
Category

Vintage 1910s Art Deco Cocktail Rings

Materials

Diamond, 18k Gold, White Gold, Yellow Gold

Platinum Vintage Style Old Mine Cut Diamond with Sapphire
By Avanti
Located in Carrollton, TX
This gorgeous reproduction vintage style ring is set in platinum with a breathtaking old mine cut
Category

2010s American Contemporary Engagement Rings

Materials

Diamond, Sapphire, Platinum

Mark Broumand 1.80 Carat Old Mine Cut Diamond Engagement Ring
By Mark Broumand
Located in Los Angeles, CA
This captivating diamond engagement ring is set with a gorgeous 1.25ct old Mine cut center diamond
Category

2010s American Edwardian Engagement Rings

Materials

Diamond, Platinum

Castellani Old Mine Cut Diamond 18kt Gold Cleopatra Ring
By Castellani
Located in New York, NY
A charming old mine cut diamond circa 1880 is bezel set into the Castellani® Cleopatra ring using
Category

21st Century and Contemporary American Egyptian Revival Solitaire Rings

Materials

Diamond, Gold, 18k Gold

Antique Old Mine Cut Diamond and Emerald Ring, circa 1920
Located in London, GB
Old mine diamond and emerald ring. Set with one central cushion shape old mine diamond in an open
Category

Vintage 1920s Unknown Edwardian Cluster Rings

Materials

Diamond, Emerald, Platinum

Vintage 14K Gold Floral Brooch with Ruby & Old Mine Cut Diamond
Located in Miami, FL
subtle sparkle. One of the leaves is adorned with an antique old mine cut diamond—a rare and desirable
Category

Vintage 1960s Brooches

Materials

Diamond, Ruby, 14k Gold

Victorian 18K Old Mine Cut Flower Dangle Earrings
Located in Venice, CA
These delicately crafted 18k gold Victorian earrings feature Old Mine Cut diamonds carefully prong
Category

Antique 1880s Unknown Victorian Dangle Earrings

Materials

Diamond, 18k Gold, Yellow Gold

Green Quartz Cabochon & 0.55 Carats Old Mine Cut Diamond Dangle Earrings 14K
Located in Los Angeles, CA
– Diamonds: 2 Old Mine Cut Cushion Diamonds ~0.55 carats total H/I color, VS clarity – Metal: 14K Yellow
Category

Vintage 1960s Artisan Dangle Earrings

Materials

Diamond, Quartz, 14k Gold

Buccellati Old Mine Cut Diamond & Pearl 18K Gold Drop Day Night Earrings
By Buccellati
Located in Miami, FL
carats in total  of two old mine-cut diamonds prong-set in ornate floral tops, the design flows into 0.25
Category

Vintage 1960s Italian Retro Drop Earrings

Materials

Diamond, Pearl, 18k Gold

Antique 20k Gold 6.30ctw Old Mine Cut Diamond Butterfly Folding Pin Brooch
Located in Montclair, NJ
–Stone(s)– (6) Natural Genuine Diamonds - Old Mine Cut - Prong Set - H-J Color - VS1/VS2 Clarity
Category

Antique 19th Century Brooches

Materials

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

Vintage Diamond Engagement Ring, 18k White Gold Old Mine Cut Solitaire .92ct
Located in Greensboro, NC
diamond solitaire. The Old Mine Cut diamond is set in an eight-sided bezel and ported from the underside
Category

Late 20th Century Unknown Cocktail Rings

Materials

Diamond, White Gold

Tahitian Pearl Old Mine cut Diamond Earrings 14K White Gold Art Deco
By Estate Jewelry
Located in East Brunswick, NJ
Tahitian Pearl Old Mine cut Diamond Earrings 14K White Gold Art Deco This absolutely stunning pair
Category

Mid-20th Century Art Deco Drop Earrings

Materials

Diamond, Pearl, 14k Gold, White Gold

Vintage 18K Yellow Gold Sapphire and Old Mine Cut Diamond Cluster Ring
Located in MONTMORENCY, FR
Cluster (Flower) Materials: 18K Yellow Gold, Natural Sapphire, Old Mine Cut Diamonds Metal Weight: 7.14
Category

Mid-20th Century French Post-War Cluster Rings

Materials

Diamond, Sapphire, Yellow Gold

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

Mid-20th Century Art Deco Cocktail Rings

Materials

Diamond, Ruby, 14k Gold, Rose Gold

.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

Antique 4.17 Carats Old Mine Diamond Solitaire Necklace
By Antinori Fine Jewels
Located in Chicago, IL
breathtaking diamond solitaire necklace, featuring a stunning 4.17ct old mine cut diamond set in a sleek 14k
Category

2010s Italian Modern Pendant Necklaces

Materials

Diamond, White Diamond

Art Deco 3.16 Carats Old Mine Cut Diamond Ruby Arrow Platinum Engagement Ring
Located in Philadelphia, PA
Centering an old mine cut diamond weighing 2.22 carats total - E color with SI1 clarity. Bezel set
Category

Vintage 1930s Art Deco Engagement Rings

Materials

Diamond, White Diamond, Ruby, Platinum

Old Mine Fancy Yellow 6.28 Carat Diamond Ring
By Antinori Fine Jewels
Located in Chicago, IL
old mine cut diamond center surrounded by a chunky old cut diamond halo! It is an absolutely stunning
Category

2010s Italian Art Deco Engagement Rings

Materials

Diamond, Platinum

Old Mine Cut Diamond 18 Carat and Platinum Marquise Shape Cluster Ring, c1910
Located in London, GB
combined. The platinum marquise bezel is prominently set in the centre with a row of 5 larger old mine cut
Category

Vintage 1910s English Edwardian Cluster Rings

Materials

Diamond, 18k Gold, Yellow Gold, Platinum

Diamond Solitaire Pendant 1 Carat Mined Bezel Set Antique Cut Pear 14K Gold Chai
Located in Dearborn, MI
Bezel Set Mined Antique Pear Cut Diamond Solitaire Pendant 1 Carat 14K White Gold Chain Featuring
Category

2010s Pendant Necklaces

Materials

Diamond, 14k Gold, White Gold

Art Deco Style Old Mine Cut Green Emeralds Cocktail Ring
By Antinori Fine Jewels
Located in Chicago, IL
set with rich green custom cut natural emeralds. Finished with fine milgrain details, this bezel
Category

2010s Italian Modern Solitaire Rings

Materials

Emerald, White Diamond, Diamond, 14k Gold

Art-Deco Three-Stone Trilogy Old Cut Bezel Set Diamond Platinum 18K Gold Ring
Located in MELBOURNE, AU
colour, SI clarity securely bezel set in platinum Side diamonds: 2 old-European cuts diamonds each of
Category

Vintage 1920s Australian Art Deco Three-Stone Rings

Materials

Diamond, 18k Gold, Platinum

Riker Edwardian 3.20 CTW Old Mine Cut Diamond 14 Karat Gold Belt Bangle Bracelet
Located in Philadelphia, PA
stations centering bezel set old mine cut diamonds Weighing approximately 3.20 carat total I/J color with
Category

Vintage 1910s Edwardian Bangles

Materials

Diamond, Gold, 14k Gold, Yellow Gold

1.22 Carat Colombian Emerald Diamond Yellow Gold Cocktail Ring
Located in Jesmond, Newcastle Upon Tyne
center. The emerald is bordered by a total of thirteen Old mine cut diamonds, bezel set in 14k yellow
Category

Antique Early 1900s French Cocktail Rings

Materials

Emerald, Diamond, 14k Gold, Yellow Gold

Edwardian Old Cut Diamond Tiara
Located in London, GB
centre, each featuring a single bezel set old cut and eight cut diamond and a pair of diamond set leaves
Category

Antique Early 1900s British Edwardian More Necklaces

Materials

Diamond, Platinum, Steel

Edwardian Old Cut Diamond Tiara
Edwardian Old Cut Diamond Tiara
H 1.28 in W 6.3 in L 6.3 in
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

Vintage Old Mine Cut Diamond Filigree Bar Pin Brooch Platinum and 14 Karat Gold
Located in Scottsdale, AZ
. The stunning pin features a single Old Mine Cut diamond (H-SI1) bezel set at the center of the piece
Category

Early 20th Century Unknown Edwardian Brooches

Materials

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

Antique Art Deco Platinum Bezel Old Mine Cushion Diamond & Sapphire Halo Ring
Located in Montclair, NJ
RARE cushion-shaped old mine cut diamond solitaire bezel set at its center. That center diamond is
Category

Vintage 1920s Art Deco Solitaire Rings

Materials

Diamond, Sapphire, Platinum

Antique Edwardian Platinum Old Cut Bezel Diamond Mosaic Milgrain Engagement Ring
Located in Montclair, NJ
1.25 carat, old European cut, diamond solitaire neatly milgrain bezel set at the center of the stunning
Category

Antique Early 1900s Edwardian Cocktail Rings

Materials

Diamond, Platinum

Art Deco Old Cut Diamond Bracelet
Located in London, GB
. Crafted in platinum, this piece features a series of white old mine cut diamonds, each set in a
Category

Vintage 1920s Art Deco Link Bracelets

Materials

Diamond, Platinum

Old Mine Platinum, Antique 0.82ct Diamond Dome Ring, I Color
Located in New York, NY
-cut diamonds set in an elegant east-west orientation. Each diamond is securely nestled within delicate
Category

Antique Early 1900s French Edwardian Dome Rings

Materials

Diamond, Platinum

Edwardian Gold & Platinum 2ctw Old Mine Diamonds & Pearl Dangle Pendant Necklace
Located in Montclair, NJ
--Stone(s):-- (1) Natural Genuine Diamond - Old European/Mine Cut - Bezel Set - H/I Color - I1-I2
Category

Antique Early 1900s Edwardian Drop Necklaces

Materials

Diamond, Pearl, Gold, Platinum

Vintage Diamond Engagement Ring, 18k White Gold Old Mine Cut Solitaire .92ct
Located in Greensboro, NC
diamond solitaire. The Old Mine Cut diamond is set in an eight-sided bezel and ported from the underside
Category

21st Century and Contemporary More Rings

Materials

Diamond, White Gold

Art Deco Platinum Brooch with Old Mine and Rose-Cut Diamonds
Located in Great Neck Plaza, NY
craftsmanship of the 1920s–30s. At its center lies a stunning 0.95-carat rose-cut diamond, bezel-set and framed
Category

Vintage 1920s Art Deco Brooches

Materials

Diamond, Platinum

Antique 0.60 Carat Old Cut Diamond Gypsy Ring
Located in London, GB
Here we have refined single stone ring showcasing a captivating old mine-cut diamond as its focal
Category

20th Century Fashion Rings

Materials

Diamond, Platinum

Vintage 18K Yellow Gold Scrollwork Emerald and Old Mine Cut Diamond Ring
Located in MONTMORENCY, FR
, Platinum-washed Accents, Natural Emerald, Old Mine Cut Diamonds Metal Weight: 9.80 g Stone Weight
Category

Mid-20th Century French Retro Dome Rings

Materials

Diamond, Emerald, Yellow Gold

C1830 Old Cut and Rose Cut Late Georgian Diamond Cluster Ring
Located in Baltimore, MD
rare combination of two different types of pave-set Georgian diamonds. This ring has both old cuts and
Category

Antique 1830s British Georgian Engagement Rings

Materials

Diamond, 18k Gold

Dainty Yellow Sapphire Old Mine Diamond Drop Earrings
Located in New York, NY
, topped with old mine-cut diamonds, weighing approximately 0.70cts.
Category

Antique Early 19th Century Drop Earrings

Materials

Diamond, Yellow Sapphire

10k White Gold Vintage Pear Ruby and Old Mine Cut Diamond Halo Ring
Located in Fairfield, CT
, reddish pink color ruby, approximately 2.71 CTS, bezel set and framed with a halo of old mine cut diamonds
Category

Mid-20th Century Fashion Rings

Materials

Diamond, Ruby, 10k Gold, White Gold

VintageDiamond Ring 14K Rose Gold Spiral 1.05 TDW Old Mine
By Estate Jewelry
Located in East Brunswick, NJ
is finely crafted in solid 14K Rose Gold and set with Old Mine cut diamonds. There are 9 Earth mined
Category

Vintage 1950s Cluster Rings

Materials

Diamond, 14k Gold, Rose Gold

Gorgeous Gold 0.75 Carat Old Miner's Cut Diamond Brooch
Located in Sherman Oaks, CA
Gorgeous Gold Brooch Features Three Bezel-Set Old Miner's Cut Diamonds Total Diamond Weight = 0.75
Category

Early 20th Century North American Victorian Brooches

Materials

Diamond, Gold

Antique 2.16ctw Mine Cut Diamond Fringe Necklace in 14 Karat Rose Gold
Located in Boston, MA
cut diamonds. The necklace features a series of antique mine and old marquise diamond drops, each set
Category

Antique Early 1900s Art Nouveau Drop Necklaces

Materials

Diamond, 14k Gold, Rose Gold, Yellow Gold

Antique Art Deco 18K Platinum Aquamarine Mine Cut Diamond Y-Drop Necklace
Located in Winter Springs, FL
natural aquamarine studded in bezel set H-I color Vs2-Si1 clarity old mine cut diamonds with a total
Category

Early 20th Century Art Deco Drop Necklaces

Materials

Aquamarine, Diamond, 18k Gold, Platinum

Antique Gold & Silver Ring w GIA No Heat Sapphire & Old Mine Peruzzi Cut Diamond
Located in Montclair, NJ
:) --Stone(s):-- (1) Natural Genuine Sapphire - Cushion Cabochon Cut - Pave Bezel Set - Dark Greenish Blue
Category

21st Century and Contemporary Cocktail Rings

Materials

Diamond, Sapphire, Gold, Silver

Antique Gold 1ct Diamond Solitaire Vintage Engagement Ring Old Cut Vienna
Located in London, GB
, crafted during the Austro-Hungarian empire period, is set with a dazzling old mine cut diamond
Category

Antique Late 19th Century Solitaire Rings

Materials

Diamond, 14k Gold

Antique Victorian 15K Gold & Silver 10.8ctw Old Cut Diamond Pendant & Brooch
Located in Staines-Upon-Thames, GB
set with old mine cut diamonds held within fleur-de-lys style settings, and heart-shaped bezel
Category

Antique 1870s British Victorian Pendant Necklaces

Materials

Diamond, 15k Gold, Silver

Art Deco 1.25 Ct. Old Mine Hand-Engraved Engagement Ring J-K VS1
Located in New York, NY
-set and irresistibly charming old mine cut diamond that's accented by 6 additional shimmering stones
Category

Early 20th Century Art Deco Engagement Rings

Materials

Diamond, Platinum

Antique Edwardian Platinum GIA 2.79ctw Old Bezel Diamond Engraved Wide Band Ring
Located in Montclair, NJ
--Stone(s):-- (1) Natural Genuine Diamond - Old European Cut - Milgrain Bezel Set- H Color - VS1
Category

Antique 19th Century Edwardian Band Rings

Materials

Diamond, Platinum

Art Deco Top River Vertical Set 6 Carat Old Euro Cut Diamond Platinum Ring
Located in Miami, FL
carats in diamonds. This gorgeous ring features 3 bezel set Old-European cut diamonds, vertically set
Category

Vintage 1930s European Art Deco Cocktail Rings

Materials

Diamond, Platinum

GIA Certified Old European Cut Diamond Engagement Ring
Located in Beverly Hills, CA
, and the old European cut diamond is bezel set in 14-karat white gold. Old European cut diamonds tend
Category

21st Century and Contemporary Unknown Contemporary Engagement Rings

Materials

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

Edwardian Platinum and Old European Cut Diamond Dangle Earrings
Located in Venice, CA
cut and Old Mine Cut diamonds. The stones are bead set and surrounded by milgrain. The scrolling
Category

Vintage 1910s Edwardian Dangle Earrings

Materials

Diamond, Platinum

Antique Gold GIA Chrysoberyl Cat's Eyes Old Mine Cut Halo Oval Stud Earrings
Located in Montclair, NJ
Diamonds - Chunky Old Mine Cut - Pave Set - White Color - 1.20ctw (approx.) Total Carat Weight: 1.20
Category

Antique 19th Century Stud Earrings

Materials

Chrysoberyl, Diamond, Tiger's Eye, Gold, Yellow Gold

Antique Art Deco 14K White Gold Filigreed Old Cut Diamond & Sapphire Brooch
Located in Houston, TX
consistent with age. Prong Set in 14 Karat White Gold with: One (1) old mine cut natural diamond
Category

Early 20th Century Unknown Brooches

Materials

Diamond, Sapphire, Gold, 18k Gold, White Gold

Antique 18k Gold Silver Hand Enamel Portrait & Old Cut Diamond Frame Pin Brooch
Located in Montclair, NJ
(approx.) (4) Natural Genuine Diamonds - Cushion Old Mine Cut - Prong Set - G/H Color - VS2/SI1 Clarity
Category

Antique 1870s Early Victorian Brooches

Materials

Diamond, 18k Gold, Silver, Enamel

Victorian 9.60ctw Emerald & Mine Cut Diamond Dangle Drop Earrings
Located in Boston, MA
carats with the two larger bezel set mine cut diamonds at top weighing approximately 0.75 carats each
Category

Antique 1880s Victorian Dangle Earrings

Materials

Diamond, Emerald, Gold, 14k Gold, Yellow Gold, Silver

Vintage Round and Old mine Diamond Pendant Necklace 14K White Gold
By Estate Jewelry
Located in East Brunswick, NJ
mine cut, round brilliant cut, and single cut diamonds. Two hanging bezel set old mine diamonds total
Category

Early 20th Century Choker Necklaces

Materials

Diamond, 14k Gold, White Gold

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Old Mine Cut Diamond Bezel Set For Sale on 1stDibs

Surely you’ll find the exact old mine cut diamond bezel set you’re seeking on 1stDibs — we’ve got a vast assortment for sale. Each design created in this style — which was crafted with great care and often made from gold, platinum and 18k gold — can elevate any look. You can easily find a 805 antique edition and 78 modern creations to choose from as well. You’re likely to find the perfect old mine cut diamond bezel set among the distinctive items we have available, which includes versions made as long ago as the 18th Century as well as those produced as recently as the 21st Century. An old mine cut diamond bezel set from Estate Jewelry, Peter Suchy and Antinori Fine Jewels — 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 and round cut alternatives. If you’re browsing our inventory for an old mine cut diamond bezel set, you’ll find that many are available today for women, but there are still pieces to choose from for unisex and men.

How Much is an Old Mine Cut Diamond Bezel Set?

Prices for an old mine cut diamond bezel set can differ depending upon size, time period and other attributes — at 1stDibs, these accessories begin at $480 and can go as high as $495,000, while this accessory, on average, fetches $6,355.

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.  

Questions About Old Mine Cut Diamond Bezel Set
  • 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.