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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

Antique Fleur-de-Lis Ring with Blue Enamel 2.20 Carat Old Mine Cuts
Located in Warrington, PA
Edwardian Fleur De Lis Ring with Blue Enamel 2.20 Carats Old Mine Cut diamonds. A beautiful blue
Category

Antique 19th Century Unknown Edwardian Cocktail Rings

Materials

Diamond, 14k Gold, Platinum

Classic Edwardian Old Mine Cut Diamond Platinum Three Stone Engagement Ring
Located in Los Angeles, CA
certified Old Mine Cushion Cut diamond graded G color and SI3 clarity. A pair of bezel set Old Mine Cut
Category

Antique Early 1900s Unknown Edwardian Engagement Rings

Materials

Diamond, Platinum

24 Karat Gold Ring with an Old European Mine Cut Diamond
By Serhat Design
Located in Istanbul, Fatih
24K Matte-satin gold, handcrafted and hand engraved with old European mine cut diamond ring. Set in
Category

Antique 15th Century and Earlier Turkish Contemporary Solitaire Rings

Materials

Diamond, 24k Gold

Old Mine cut 2.33 carat Diamond Sapphire Emerald Platinum Engagement Ring
Located in New York, NY
Diamond, sapphire & emerald ring centering a bezel set Old Mine Brilliant cut diamond weighing app
Category

21st Century and Contemporary Unknown Contemporary Engagement Rings

Materials

Blue Sapphire, Diamond, Emerald, Platinum

Refined Art Deco Three Stone Old Mine Cut Diamond platinum Engagement Ring
Located in Los Angeles, CA
. This classic Art Deco design centers a bezel set 1.06ct EGL certified Old Mine Brilliant Cut diamond
Category

Vintage 1920s Unknown Art Deco Engagement Rings

Materials

Diamond, Platinum

Art Deco Old Cut Diamond Cluster Ring in Platinum
Located in Oxted, Surrey
Art Deco Diamond Cluster Ring. Set with fine quality Old Cut naturally mined Diamonds in a handmade
Category

Vintage 1920s Art Deco Cluster Rings

Materials

Diamond, White Diamond, Platinum

Art Deco 1.20 Carat Old Cut Diamond Platinum Solitaire Ring
Located in Essex, GB
. Centred by a high white old cut diamond bezel set within a “gypsy” mount. The brushed platinum gives this
Category

Mid-20th Century Solitaire Rings

Materials

Diamond, White Diamond, Platinum

Old-cut diamond marquise ring in 18 karats rose gold
Located in PARIS, FR
Old-cut diamond marquise ring in 18 karats rose gold. Oval-shaped ring set with 27 old-cut diamonds
Category

Antique 1880s European Late Victorian Wedding Rings

Materials

Diamond, Rose Gold

Art Deco Platinum Old Cushion Cut Diamond and Baguette Cut Diamond Ring
Located in Melbourne, AU
Featuring, in a high, four claw set, centre, one old mine cut Diamond within open-sided bezel
Category

Vintage 1920s Art Deco Engagement Rings

Materials

Diamond, Platinum

Old Cut and Baguette Cut Diamond Engagement Ring
Located in Theydon Bois, Essex
shaped old mine cut diamond is contrasted with the precision of the 18 baguette cut stones in the
Category

Mid-20th Century Revival Engagement Rings

Materials

Diamond, 18k Gold

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

Boodles Step Cut Sapphire Old Cut Diamond Gold Trilogy Ring
By Boodles
Located in Theydon Bois, Essex
and old mine / miner cut diamonds. Colour – The diamonds are G Clarity –VS1. Carat – The
Category

Late 20th Century British Three-Stone Rings

Materials

Blue Sapphire, Diamond, 18k Gold

Art Deco 1.20 Carat Old Cut Diamond Platinum Solitaire Ring
Located in Theydon Bois, Essex
. Centred by a high white old cut diamond bezel set within a “gypsy” mount. The brushed platinum gives this
Category

Mid-20th Century Art Deco Solitaire Rings

Materials

Diamond, Platinum

Edwardian 0.91 Carat Old Cut Diamond Platinum “Buttercup” Engagement Ring
Located in Theydon Bois, Essex
A quite striking old cut diamond solitaire engagement ring, in platinum, which we adapted from a
Category

Early 20th Century British Edwardian Engagement Rings

Materials

Diamond, Platinum

Art Deco 3.23 Carat Old Cut Diamond Platinum Engagement Ring
Located in Theydon Bois, Essex
This is all about the diamond. The clean and phenomenally lively old cut diamond is set in a eight
Category

Vintage 1920s French Art Deco Engagement Rings

Materials

Diamond, Platinum

Vintoge Art Deco Ring Platinum Antique Cut Diamond 0.70 Ctw. Emerald and Diamond
Located in Valencia, Comunidad Valenciana
Extraordinary Art Deco Ring made of Platinum weight 4.64 grams, Central Diamond Antique Cut measure
Category

Vintage 1930s Unknown Art Deco Dome Rings

Materials

Diamond, Emerald, Platinum

Romantic Antique Diamond Platinum Ring
Located in New York, NY
with beaded border, leading to the center old mine-cut diamond, approximately .50 ct., in a bezel
Category

Antique 1890s American More Rings

Materials

Diamond, Platinum

Marguerite diamond ruby ring in 18-karat white gold
Located in PARIS, FR
Marguerite diamond ruby ring in 18-karat white gold. The ring features a central significant old
Category

Vintage 1970s French Modern Cluster Rings

Materials

Diamond, Ruby, White Gold

Antique Victorian Solitaire Diamond Ring in 18 Karat Pink Gold, Wedding Ring
Located in PARIS, FR
Antique Victorian solitaire diamond ring in 18 karat pink gold. Engagement ring with an old mine
Category

Antique 1890s French Late Victorian Wedding Rings

Materials

Diamond, Gold, 18k Gold, Rose Gold

Art Deco Bombe Platinum cocktail ring with diamonds for 2.70 ct.
Located in Milano, IT
of a bygone era. Adorned with diamonds, the central old-cut round stone, boasting an approximate
Category

Vintage 1920s Italian Art Deco Dome Rings

Materials

Diamond, Platinum

9.01 Carat Diamond Ring in Oxidized Sterling Silver and 14 Karat Gold
Located in New York, NY
around the band and an old mine cut (polki) diamond in the center of the ring. The inside of the ring is
Category

2010s Indian Contemporary Cocktail Rings

Materials

Diamond, Brown Diamond, 14k Gold, Sterling Silver

Antique Victorian Ruby Diamond Ring in 0.85ct Ruby
Located in Kendal, GB
twinkling old mine cut diamonds nestled in between, approx. 0.05ct each (0.20ct total). Ruby is the
Category

Antique Early 1900s Victorian Engagement Rings

Materials

Diamond, Ruby, Gold

2.20 Carat Edwardian Diamond Ring
Located in San Francisco, CA
a couple of smaller friends and geometrically framed with small old mine-cut diamonds that continue
Category

20th Century Edwardian Engagement Rings

Materials

Diamond, White Diamond, Platinum

Antique Amethyst Diamond Gold Ring
Located in Dallas, TX
14K rose gold antique ring set with large oval amethyst 22.50 ct. surrounded by Old Mine cut
Category

Antique Late 19th Century Unknown More Rings

Materials

Amethyst, Diamond, 14k Gold, Rose Gold

Blue Sapphire and Diamond Ring
Located in Bellmore, NY
square halo of Old Mine cut Diamonds. Channel set in a square around the diamonds are calibrated cut
Category

Antique Late 19th Century Unknown Victorian Cocktail Rings

Materials

Diamond, Sapphire, 14k Gold, Silver

Sparkling Victorian Diamond Gold Engagement Ring
Located in Los Angeles, CA
sparkling array of Old Mine Cut diamonds. The ring features five Old Mine Cut and Old European Cut diamonds
Category

Antique 1880s Unknown Victorian Engagement Rings

Materials

Diamond, Yellow Gold

5.00 Carat Aquamarine Diamond Gold Ring
Located in Potts Point, NSW
An emerald cut aquamarine ring, bezel set in 18 karat white gold with an old mine cut diamond on
Category

Mid-20th Century Unknown Cocktail Rings

Materials

Aquamarine, Diamond, 18k Gold

Vintage Edwardian Platinum 1.00 Carat Diamond Ring Cocktail Right Hand Ring
Located in West Hollywood, CA
Platinum hand pierced Edwardian Diamond ring, feating 2 prominent Old Mine Cut diamonds sharing
Category

Early 20th Century Unknown Edwardian Bridal Rings

Materials

Diamond, White Diamond, Platinum

Art Deco Sapphire Diamond Platinum Arrow Ring
Located in Calabasas, CA
. Total diamond weight for triangular-cut, .21 carats, 2 rectangular-cut, .29 carats, 23 round old mine
Category

Vintage 1930s Unknown Art Deco More Rings

Materials

Diamond, Sapphire, Platinum

7.40 Carat Arts Crafts Cushion-Cut Natural Pink Sapphire Ring in Platinum
Located in San Francisco, CA
is set in a milgrained bezel and is accompanied on each side by a sparkling old mine-cut diamond. All
Category

20th Century Arts and Crafts Cocktail Rings

Materials

Diamond, Sapphire, Pink Sapphire, Platinum

Art Deco diamond ring in 14k gold
Located in PARIS, FR
mine cut diamonds in a bezel setting. The ring is elegantly decorated with geometric lines and openwork
Category

Vintage 1920s European Art Deco Fashion Rings

Materials

Diamond, 14k Gold, Platinum

Art Deco Three-Stone Twisted Ring 1.25 Carat Diamond
Located in Napoli, IT
with further antique Diamonds – 10 old mine cut adding .50 Ct of more dazzling effect – G/H VS Head is
Category

Vintage 1920s Art Deco Three-Stone Rings

Materials

Diamond, 18k Gold, Platinum

Burmese Ruby and Diamond Ring
Located in Southampton, NY
mine cut diamonds at the bezel. Size : 6.25
Category

English Cluster Rings

Art Deco 3.65 Carat Diamond Platinum Three-Stone Ring
Located in San Francisco, CA
, each of which is embraced by a partial circle of sparkling old mine-cut diamonds accentuated with
Category

Vintage 1930s Unknown Art Deco Engagement Rings

Materials

Diamond, White Diamond, Platinum

Late Victorian Emerald Diamond Halo Platinum Engagement Ring
Located in Los Angeles, CA
(circa 1895). This captivating platinum topped 18k yellow gold ring centers a single bezel set Step-Cut
Category

Antique 1890s Unknown Late Victorian Engagement Rings

Materials

Diamond, Emerald, Yellow Gold

Antique Filigree Ring Set with Australian Opal and Diamonds
Located in Warrington, PA
shape and bezel set. On either side of the center is a single 0.01 carat old mine cut diamond.
Category

Antique Late 19th Century Unknown Edwardian Engagement Rings

Materials

Diamond, Opal, 14k Gold

French Belle Époque Untreated Ruby Diamond Gold Ring
Located in Middleton, WI
further 76 diamonds, a mix of old European mine cuts and Mazarin cuts. The diamonds add up to a total of
Category

Vintage 1910s French Belle Époque Dome Rings

Materials

Diamond, Ruby, 18k Gold, Platinum

9.05 Carat Fancy Intense Yellow Square Radiant Diamond Engagement Ring
By Prestigious New York Jeweler
Located in Lakewood, NJ
platinum ring with shield shape white diamond side stones. The unique center stone is cut with large
Category

Mid-20th Century American Contemporary Engagement Rings

Materials

Diamond, White Diamond, Yellow Diamond, Platinum

AGL Certified 5.32 Ct. UNTREATED Burma Sapphire Diamond Platinum Edwardian Ring
Located in Calabasas, CA
natural sapphire surrounded by 12 old European-cut and Old Mine-cut diamonds in an intricately pierced
Category

Vintage 1910s Unknown Edwardian Engagement Rings

Materials

Diamond, Sapphire, Platinum

Cushla Whiting Sapphire and Diamonds set in gold Circles Engagement Ring
By Cushla Whiting
Located in Melbourne, AU
old mine brilliant cut diamonds. Bezel set with milgraining. Diamonds are D-G colour SI clarity
Category

2010s Australian Modern Engagement Rings

Materials

Diamond, Sapphire, 18k Gold

White Gold Art Deco Diamond and Onyx Ring with Hand Engraving
Located in San Francisco, CA
ring features one bezel-set 0.35ct Old Mine Cut diamond with I1 clarity and I-J color. The diamond is
Category

Antique 1890s Unknown Late Victorian Cocktail Rings

Materials

Diamond, Onyx, 18k Gold

1950s Impressive Cabochon Oval Shaped Coral with Diamonds Gold Cocktail Ring
Located in New York, NY
Two Old Mine Cut Diamonds Weighing Approximately 2.40 Cts Total Weight. All Diamonds Beautifully Bezel
Category

Vintage 1950s American Cocktail Rings

Materials

Coral, Diamond, 18k Gold

Impeccable Bombe Style Victorian Cluster Ring
Located in Los Angeles, CA
1940's. This impeccable bombe style cluster ring centers one bezel set 0.84ct EGL certified Old Mine
Category

Antique 1880s Unknown Victorian Engagement Rings

Materials

Diamond, Silver, Yellow Gold

Burmese Ruby Ring
Located in Southampton, NY
An early C20th platinum ring set with an oval pink Burmese Ruby at the center, with old mine cut
Category

French Engagement Rings

Vintage Mid-Century 4.77ct Burma Ruby Cocktail Ring
Located in Sale, Cheshire
4.77 carat no heat Burma ruby, bezel set within two waves of pavé old mine cut diamonds. It's crafted
Category

Mid-20th Century French Modernist Cocktail Rings

Materials

Diamond, Ruby, Platinum

River-Rose Twist Flow Bracelet with Teal Sapphire 18 Karat
By JeweLyrie
Located in Paterson, NJ
link is defined with a bezel set 2mm precision cut Teal sapphire. JeweLyrie signature infinity twist is
Category

2010s American Contemporary Link Bracelets

Materials

Pink Sapphire, 18k Gold, Rose Gold, White Gold, Yellow Gold

Vintage French Old Mine Cut Diamond 18 Karat Gold Bezel Set Ring
Located in Beverly Hills, CA
One Vintage French Old Mine Cut Diamond 18 Karat Gold Bezel Set Ring. Featuring one old mine cut
Category

Vintage 1960s French Dome Rings

Materials

Diamond, 18k Gold

Art Deco Bezel Set Platinum 1.45 Carat Old Mine Cut Diamond Engagement Ring
Located in Santa Barbara, CA
Weight: 1.45 Cut: Old Mine Color: L Clarity: VS1   Accent Diamonds: 6 Round Diamonds 0.06 Carats Ring
Category

Vintage 1920s Art Deco Engagement Rings

Materials

Diamond, Platinum

Onyx and Old Mine Cut Diamond Ring
Located in Towson, MD
white gold bezel with one center bezel set Old Mine cut diamond approximately 0.06 carat. The yellow
Category

Vintage 1930s Art Deco Fashion Rings

Materials

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

Edwardian Era Old Mine Cut Diamond Engagement Ring
Located in NEW ORLEANS, LA
stunning 0.80 carat old mine cut diamond set preciously in a platinum bezel. Surrounding the diamond is an
Category

Early 20th Century Engagement Rings

Materials

Diamond, Yellow Gold, Platinum

2.13 Carat Old Mine Cut Art Deco Diamond Ring
Located in Carmel-by-the-Sea, CA
old mine brilliant cut diamond. The major stone exhibits I-J color and Si2-I1 clarity. The ring is
Category

Vintage 1930s Engagement Rings

Materials

Diamond, Platinum

Floral 1 Carat Old Mine Cut Diamond Engagement Ring
Located in Santa Barbara, CA
This antique Edwardian ring has been restored with a gorgeous 1 carat old mine diamond held in a
Category

2010s Edwardian Engagement Rings

Materials

Diamond, Platinum

3 Carat Old Mine Cut Diamond Emerald Engagement Ring
Located in Santa Barbara, CA
unique emerald halo. The near 3 carat antique diamond has all the personality we love in an old mine cut
Category

2010s Art Deco Engagement Rings

Materials

Diamond, Emerald, Platinum

Victorian 2.28 Carats Old Mine Cut Diamond 14k Rose Gold Silver Bezel Set Ring
Located in Beverly Hills, CA
One Victorian 2.28 Carats Old Mine Cut Diamond 14k Rose Gold Silver Bezel Set Ring. Featuring one
Category

Antique 1880s Victorian Engagement Rings

Materials

Diamond, Gold, 14k Gold, Rose Gold, Silver

Antique 18K TT Gold Bezel Blue Stone 1.1ctw Old Mine Cut Diamond Platter Ring
Located in Montclair, NJ
complemented by the fiery old mine cut diamonds that brilliantly sparkle adding an incredibly glamorous look to
Category

Vintage 1910s Art Deco Cocktail Rings

Materials

Diamond, 18k Gold, White Gold, Yellow Gold

Victorian 14k Old Mine Cut Diamond Snake Ring .20ct
Located in Narberth, PA
stacked band. A spectacular prong set .20ct old mine cut diamond rests in the snake's head. The snake
Category

Antique Late 19th Century Victorian Solitaire Rings

Materials

Diamond, 14k Gold

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Old Mine Cut Bezel Diamond Ring For Sale on 1stDibs

Find the exact old mine cut bezel 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, platinum and white gold — can elevate any look. You can easily find a 157 antique edition and 32 modern creations to choose from as well. Finding the perfect old mine cut bezel diamond ring may mean sifting through those created during different time periods — you can find an early version that dates to the 18th Century and a newer variation that were made as recently as the 21st Century. An old mine cut bezel diamond ring from Estate Jewelry, Antinori Fine Jewels and Hancocks — 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 cushion cut cut versions available here, too. When shopping for an old mine cut bezel diamond ring, you’ll find that there are less available pieces for unisex or men today than there are for women.

How Much is an Old Mine Cut Bezel Diamond Ring?

On average, an old mine cut bezel diamond ring at 1stDibs sells for $6,870, while they’re typically $1,000 on the low end and $237,950 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.  

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 Old Mine Cut Bezel 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.