Skip to main content

3 Carat Old Mine Cut Diamond

to
62
1,271
272
986
662
470
354
219
166
153
141
125
106
92
77
49
37
37
35
33
28
21
18
12
12
10
9
9
9
7
6
5
4
3
3
2
2
2
1
1
1
1
11
5
5
5
4
Sort By
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

One Carat Old Mine Cut Diamond Platinum Pearl Engagement Ring Antique Victorian
Located in New York, NY
Old Mine Cut Diamond of approximately .65 Carats. The diamond is brilliantly white and sparkling
Category

Early 20th Century Unknown Victorian Wedding Rings

Materials

Diamond, Pearl, Platinum, Gold

Edwardian GIA 1.44 Carats Old Mine Cut Diamond 18 Karat White Gold Ring
Located in Beverly Hills, CA
One Edwardian GIA 1.44 Carats Old Mine Cut Diamond 18 Karat White Gold Ring. Featuring one GIA old
Category

Vintage 1910s Edwardian Engagement Rings

Materials

Diamond, Gold, 18k Gold, White Gold

Victorian Old Mine Cushion Cut Diamond Drop Gold Earrings
Located in Los Angeles, CA
Victorian old mine cushion-cut diamond drop gold earrings circa 1890. Featuring a pair of old mine
Category

Antique 1890s Victorian Drop Earrings

Materials

Diamond, 14k Gold

3.16 Carat Edwardian Old Mine Cut Diamond Three Stone Platinum Ring Circa 1910
Located in Los Angeles, CA
3.16 Carat Edwardian Old Mine Cut Diamond three stone platinum ring, circa 1910. The Edwardian era
Category

Vintage 1910s Edwardian Three-Stone Rings

Materials

Diamond, Platinum

Retro 0.43 Carat Old Mine Cut Diamond 18 Karat White Gold Ring
Located in Beverly Hills, CA
One Retro Old Mine Cut Diamond 18 Karat White Gold Ring. Featuring one old mine cut diamond of
Category

Vintage 1940s Unknown Retro More Rings

Materials

Diamond, 18k Gold, White Gold

Art Deco 4 Carat Old Mine and European Cut Diamond Platinum Cross
Located in Miami, FL
gorgeous Old Miner cut diamond weighing approximately 1 carat, and further embellished with 57 Old European
Category

Vintage 1920s Unknown Art Deco Pendant Necklaces

Materials

Diamond, Yellow Gold, Platinum

Victorian Old Mine Cut Diamond Enamel Gold Engagement Ring
Located in Los Angeles, CA
Victorian "1886" old mine cut diamond and enamel engagement gold ring. Featuring an old mine-cut
Category

Antique 1880s Victorian Engagement Rings

Materials

Diamond, 15k Gold

Arts Crafts 1.38 Carats Fancy Colored Old Mine European Cut Diamond Ring
Located in Philadelphia, PA
Featuring an old mine cut diamond weighing approximately 1.04 carats total. Fancy deep greenish
Category

Antique Early 1900s Arts and Crafts Three-Stone Rings

Materials

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

Jack Weir Sons Old Mine Cut Diamond Platinum Ring
Located in Beverly Hills, CA
A modern ring made in the Art Deco style, featuring a 5.83 carat old mine cut diamond, O-P color VS
Category

21st Century and Contemporary American Art Deco Engagement Rings

Materials

Diamond, Platinum

Victorian Old Mine Cut Diamond Gold Drop Dangle Earrings
Located in Banbury, GB
A beautiful pair of Victorian diamond drop earrings. Each earring has got 3 gorgeous old mine cut
Category

Antique 1820s British Victorian Clip-on Earrings

Materials

Diamond, 18k Gold

Art Deco 3.59 Carats Old Mine Cut Diamond Platinum Wheat Vintage Engagement Ring
Located in Philadelphia, PA
Centering an old mine cut diamond weighing 3.01 carats - O/P color with SI1 clarity. Set with
Category

Vintage 1930s Art Deco Engagement Rings

Materials

Diamond, White Diamond, Platinum

GIA 1.46 Carat Old Mine Cut Diamond 18 Karat Gold Three Stone Ring
By Jack Weir and Sons
Located in Beverly Hills, CA
One GIA 1.46 Carat Old Mine Cut Diamond 18 Karat Gold Three Stone Ring. Featuring one GIA certified
Category

2010s American Three-Stone Rings

Materials

Diamond, 18k Gold, Platinum

Victorian GIA 1.70 Carats Old Mine Cut Diamond 18 Karat Rose Gold Silver Ring
Located in Beverly Hills, CA
One Victorian GIA 1.70 Carats Old Mine Cut Diamond 18 Karat Rose Gold Silver Ring. Featuring one
Category

Antique 1880s Victorian Engagement Rings

Materials

Diamond, Gold, Rose Gold, Silver

Edwardian GIA 0.84 Carat Old Mine Cut Diamond 18 Karat Rose Gold Ring
Located in Beverly Hills, CA
center stone is a GIA certified 0.84 carat Old Mine Cut Diamond, K color, VS2 clarity. Set in 18k Rose
Category

Vintage 1920s Edwardian Engagement Rings

Materials

Diamond, 18k Gold, Rose Gold

Art Deco Diamond Engagement Ring 900 Platinum Old Mine Cut Genuine .71 Carat
Located in Greensboro, NC
its strength and enduring beauty. The center of the ring showcases an Old Mine Cut diamond solitaire
Category

Vintage 1920s Unknown Art Deco Engagement Rings

Materials

Diamond, Platinum

Vintage Diamond Ring 14 Karat White Gold 0.67 Carat Old Mine Cut Jewelry
Located in Torrance, CA
. Centrally mounted estimated 0.67 carat old Mine cut diamond is accented with a further 0.72 carats of
Category

Mid-20th Century Unknown Retro Engagement Rings

Materials

Diamond, White Diamond, 14k Gold, White Gold

Mid Century GIA 1.70 Carats Old Mine Cut Diamond 18k Yellow Gold Solitaire Ring
Located in Beverly Hills, CA
One Mid Century GIA 1.70 Carats Old Mine Cut Diamond 18k Yellow Gold Solitaire Ring. Featuring one
Category

Vintage 1960s Solitaire Rings

Materials

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

Vintage 2.21 Carat Old Mine Cut Diamond 18 Karat Gold Platinum Solitaire Ring
Located in Beverly Hills, CA
One Vintage 2.21 Carat Old Mine Cut Diamond 18 Karat White Gold Platinum Solitaire Ring. Featuring
Category

Vintage 1950s Retro Engagement Rings

Materials

Diamond, 18k Gold, White Gold, Platinum

18 Karat Rose Gold Crown Ring With Old Mine Cut Diamonds 0.51 Carat
Located in Hong Kong, HK
authentic old mine cut diamonds. There are a combination of 3 old mine cut authentic old mine cut diamonds
Category

2010s Hong Kong Three-Stone Rings

Materials

Diamond, White Diamond, 18k Gold, Rose Gold, Gold

Antique 0.85 Carat Old Mine Cut Diamond 18 Karat Gold Solitaire Engagement Ring
Located in Beverly Hills, CA
One Antique Old Mine Cut Diamond 18 Karat Gold Solitaire Engagement Ring. Featuring one old mine
Category

Vintage 1910s Victorian Solitaire Rings

Materials

Diamond, Gold, 18k Gold, Yellow Gold

2 Carat Old Mine Cut Diamond Platinum Pearl Ring Antique Victorian Flower Motif
Located in New York, NY
This is a stunning antique Victorian two carat Old Mine Cut Diamond ring with a central 7MM Pearl
Category

Early 20th Century Unknown Victorian Cocktail Rings

Materials

Diamond, Pearl, 14k Gold, Platinum

Mid Century English GIA 1.42 Carats Old Mine Cut Fancy Color Diamond Gold Ring
Located in Beverly Hills, CA
One Mid Century English GIA 1.42 Carats Old Mine Cut Fancy Color Diamond Yellow Gold Cluster Ring
Category

Vintage 1960s British Cluster Rings

Materials

Diamond, Yellow Diamond, Brown Diamond, Gold, 9k Gold, Yellow Gold

Victorian 1.64 Carats Ruby Old Mine Cut Diamond 18 Karat Yellow Gold Ring
Located in Philadelphia, PA
color. Flanked by two old mine cut diamonds weighing approximately 0.70 carat total. I color with I1
Category

Antique 1880s Victorian Three-Stone Rings

Materials

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

Victorian 0.80 Carat Old Mine Cut Diamond Natural Pearl 18 Karat Gold Ring
Located in Philadelphia, PA
. Featuring a clustered surround of old mine cut diamonds. Weighing approximately 0.80 carat total. H/I color
Category

Antique 1860s Victorian Cluster Rings

Materials

Diamond, White Diamond, Natural Pearl, 18k Gold, Yellow Gold, Gold

Vintage French GIA 3.20 Carat Old Mine Cut Diamond 18 Karat Gold Engagement Ring
Located in Beverly Hills, CA
One Vintage French GIA 3.20 Carat Old Mine Cut Diamond 18 Karat Gold Engagement Ring. Featuring one
Category

Early 2000s French Engagement Rings

Materials

Diamond, 18k Gold, Yellow Gold

Late Victorian 4.30 Carats Old Mine Cut Diamonds 18K Gold Navette Dinner Ring
Located in Beverly Hills, CA
One Late Victorian 4.30 Carats Old Mine Cut Diamonds 18K Gold Navette Dinner Ring. Featuring 21 old
Category

Antique 1880s Unknown Late Victorian Cluster Rings

Materials

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

GIA Midcentury 7.70 Ctw Old Mine Cut Diamond Platinum Engagement Ring
Located in Philadelphia, PA
Centering an old mine cut diamond weighing 7.70 carats total - U/V color with VVS1 clarity. Set
Category

Vintage 1950s Engagement Rings

Materials

Diamond, Platinum

1.2 Carat Victorian Old Mine Cushion Cut and Turquoise Ring, circa 1880s
Located in Addison, TX
Victorian era diamond engagement ring features an amazing 1.2 carat chunky old mine cushion cut diamond set
Category

Antique Late 19th Century Unknown Victorian Engagement Rings

Materials

Diamond, Turquoise, 18k Gold

Edwardian 1.16 CTW Old Mine Cut Diamond Platinum Buttercup Engagement Ring
Located in Philadelphia, PA
Centering an old mine cut diamond weighing approximately 0.91 carat - H color with SI2 clarity Set
Category

Vintage 1910s Edwardian Engagement Rings

Materials

Diamond, Platinum

Art Deco 5.19 Carat Old Mine Cut Diamond Platinum Ring
Located in Birmingham, AL
This show-stopper of a diamond ring centers a 5.19ct old mine cut diamond, which grades as an "
Category

Vintage 1920s Unknown Art Deco Fashion Rings

Materials

Diamond, White Diamond, Platinum

Art Deco GIA 2.08 Old Mine Cut Diamond Platinum Engagement Ring
Located in Beverly Hills, CA
Center 2.08 carat GIA certified old mine cut diamond graded L color SI1 clarity Accented by 10
Category

Vintage 1920s Art Deco Engagement Rings

Materials

Diamond, Platinum

Art Deco Old Mine Cut Diamonds Gold and Platinum Pendant Necklace
Located in London, GB
and platinum Stones: 1 Diamond • Cut: Old mine • Carat Weight: 1ct approx. • Color: J/K • Clarity: Si
Category

Vintage 1920s French Art Deco Pendant Necklaces

Materials

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

Art Deco 3.80 Carat Old Mine Diamond Platinum Engagement Ring
Located in Philadelphia, PA
Centering an old mine cut diamond in a square form head,weighing approximately 3.30 carats total, Q
Category

Early 20th Century Art Deco Engagement Rings

Materials

White Diamond, Platinum

Art Deco Old Mine Cut Diamond Platinum Vintage Fancy Link Line Bracelet
Located in Philadelphia, PA
Comprised of fancy navette shaped links each centering old mine cut diamonds Weighing approximately
Category

Vintage 1930s Art Deco Link Bracelets

Materials

Diamond, Platinum

Edwardian Platinum 2.88 Ct Old Mine Cut Vintage Diamond Filigree Engagement Ring
Located in Addison, TX
carat (2.88 Ct) warm old mine cut diamond is a subtle halo or diamonds that catch the light at every
Category

Antique Early 1900s Unknown Edwardian Engagement Rings

Materials

Diamond, Platinum

Victorian 3-Stone Old Mine Diamond Gold Ring Estate Fine Jewelry
Located in Montreal, QC
Antique Victorian Three-Stone Old Mine-cut Diamond Ring. Center securely set with a 0.80 Carat
Category

Antique Late 19th Century Victorian Three-Stone Rings

Materials

Diamond, Gold, 18k Gold, Yellow Gold

Mid-Century Fancy Light Yellow-Green Old Mine Cut Diamond Platinum Vintage Ring
Located in Philadelphia, PA
Centering an old mine-cut diamond weighing approximately 1.95 carats - fancy light greenish-yellow
Category

Vintage 1950s Engagement Rings

Materials

Diamond, White Diamond, Platinum

GIA 4.74 Carat Old Mine Diamond 18K Gold Engagement Ring
By Jack Weir and Sons
Located in Beverly Hills, CA
GIA 4.74 Carat Old Mine Cut Diamond 18K Gold Solitaire Engagement Ring. GIA certified as 4.74 carat
Category

2010s American Engagement Rings

Materials

Diamond, Gold, 18k Gold, Yellow Gold

Victorian Old Mine-Cut Diamond Silver and Gold Half Hoop Ring
Located in Houston, TX
Victorian 18K yellow gold and sterling silver Old Mine-cut diamond graduated five stone half hoop
Category

Antique 1880s Unknown Victorian Bridal Rings

Materials

Diamond, Gold, 18k Gold, Silver

Victorian 3.95 Carats No-Heat Ceylon Sapphire Old Mine Cut Diamond 14 Karat Yell
Located in Philadelphia, PA
mine cut diamonds in prong set halo weigh approximately 1.30 carats total - H to I in color with VS
Category

Antique 1890s Victorian Cluster Rings

Materials

Diamond, White Diamond, Sapphire, Blue Sapphire, Gold, 14k Gold, Yellow ...

"R" Initial Ring Old Mine Cut Diamond Platinum Antique Victorian Edwardian
Located in New York, NY
set with sparkling white Old Mine Cut Diamonds which are set in Platinum in an open work initial
Category

Early 20th Century Unknown Victorian Cocktail Rings

Materials

Diamond, Platinum, 18k Gold

Art Deco GIA 1.53 Carat Old Mine Cut Diamond Sapphire Platinum Toi Et Moi Ring
Located in Beverly Hills, CA
One Art Deco GIA 1.53 Carat Old Mine Cut Diamond Sri Lanka No Heat Sapphire Platinum Toi et Moi
Category

Vintage 1920s American Art Deco Engagement Rings

Materials

Diamond, Sapphire, Platinum

GIA 4.70 Carat Old Mine Cushion Diamond Cluster Engagement Ring
Located in New York, NY
Engagement Ring dazzles with GIA Certified 3.32ct Old Mine Cushion Center Diamond in N color I1 clarity; with
Category

Antique 1890s Victorian Engagement Rings

Materials

Diamond, 18k Gold, Yellow Gold

Antique Old Mine Cut Diamond Yellow Gold Toi Et Moi Ring
Located in Beverly Hills, CA
One Antique Old Mine Cut Diamond Yellow Gold Toi et Moi Ring. Featuring two old mine cut diamonds
Category

Antique Early 1900s Unknown Edwardian More Rings

Materials

Diamond, 14k Gold, Yellow Gold

Early Victorian Old Mine Cut Diamond Cross
Located in Carmel-by-the-Sea, CA
old mine cut diamonds that weigh approximately 3 carats in total. Each stone is set in a “belcher
Category

Antique 1850s Victorian Necklace Enhancers

Materials

Diamond, Silver, Yellow Gold

Art Deco 1.11 Carats Old Mine Diamond Platinum Engagement Ring GIA
Located in Philadelphia, PA
octagonal form featuring an old mine cut diamond weighing 0.83 carat - H color with VS2 clarity. With old
Category

Vintage 1930s Art Deco Engagement Rings

Materials

Diamond, White Diamond, Platinum

Art Nouveau 1.00 Total Carat Mine Cut Diamond 3-Stone Ring
Located in Narberth, PA
. The three old Cushion Mine Cut diamonds have a collective weight of approximately 1.00ctw and sparkle
Category

Antique Early 1900s Unknown Art Nouveau Three-Stone Rings

Materials

Diamond, 18k Gold

Edwardian English Old Mine Cut Diamond 18K Gold Five Stone Ring
Located in Beverly Hills, CA
One Edwardian English Old Mine Cut Diamond 18K Gold Five Stone Ring. Featuring five old mine cut
Category

Vintage 1910s English Edwardian More Rings

Materials

Diamond, 18k Gold, Yellow Gold

Art Deco 1.08 Carat Old Mine Diamond Platinum Engagement Ring GIA
Located in Philadelphia, PA
Centering an old mine cut diamond weighing 1.08 carats; K color with SI1 clarity Set in a square
Category

Vintage 1930s Art Deco Engagement Rings

Materials

Diamond, White Diamond, Platinum

Antique Old Mine Cut Diamond Halo 18 Karat Gold Engagement Ring
Located in Beverly Hills, CA
diamond of approximately 1.00 carats, graded I color, SI2 clarity. Accented by ten old mine cut diamonds
Category

Antique 1890s Unknown Late Victorian Engagement Rings

Materials

Diamond, 18k Gold, Yellow Gold, 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

Victorian 0.86 Old Mine Cut Diamond 14K Gold Antique Solitaire Engagement Ring
Located in Philadelphia, PA
Centering an old mine cut diamond weighing approximately 0.86 carat - J color with SI1 clarity Set
Category

Antique 1880s Victorian Solitaire Rings

Materials

Diamond, Gold, 14k Gold, Yellow Gold

18K Old Mine Cut 1.30 CTTW Antique Diamond Three Stone Engagement Ring
Located in Addison, TX
Carat Weight: 0.45Ct Color: H Clarity: SI1 Accent Diamonds: Shape: Old Mine Cut Carat: 0.40 Cttw
Category

Vintage 1920s Unknown Art Deco Engagement Rings

Materials

Diamond, 18k Gold, Yellow Gold

Victorian 1.60 Carats Old Mine Diamond 14 Karat Gold Cluster Ring
Located in Philadelphia, PA
Cluster ring centers an old mine cut diamond weighing approximately 0.90 carat - H/I color with VS
Category

Antique 1880s Victorian Cluster Rings

Materials

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

Victorian 1.60 Carats Old Mine Diamond 14 Karat Gold Cluster Ring
Located in Philadelphia, PA
Cluster ring centers an old mine cut diamond weighing approximately 0.90 carat - H/I color with VS
Category

Antique 1880s Victorian Cluster Rings

Materials

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

Old Mine Cut 0.35 Carat Diamond Art Deco Gold Engagement Ring
Located in Los Angeles, CA
Old Mine-cut Diamond 0.35 Carat Art Deco Gold Engagement Ring Art Deco 0.35 carat old mine-cut
Category

Vintage 1930s Art Deco Engagement Rings

Materials

Diamond, 14k Gold, Yellow Gold

  • 1
  • ...
Get Updated with New Arrivals
Save "3 Carat Old Mine Cut Diamond", and we’ll notify you when there are new listings in this category.

3 Carat Old Mine Cut Diamond For Sale on 1stDibs

On 1stDibs, you can find the most appropriate 3 carat old mine cut diamond for your needs in our varied inventory. Frequently made of Gold, Platinum and 18k Gold, this item was constructed with great care. In our selection of items, you can find a vintage example as well as a contemporary version. Finding the perfect 3 carat old mine cut diamond 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. There have been many well-made iterations of the classic 3 carat old mine cut diamond over the years, but those made by Mark Broumand, Single Stone and Hancocks are often thought to be among the most beautiful. 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 cushion cut and round cut alternatives. When shopping for a 3 carat old mine cut diamond, you’ll find that there are less available pieces for unisex or men today than there are for women.

How Much is a 3 Carat Old Mine Cut Diamond?

Prices for a 3 carat old mine cut diamond can differ depending upon size, time period and other attributes — at 1stDibs, these accessories begin at $560 and can go as high as $495,000, while this accessory, on average, fetches $9,433.

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 3 Carat Old Mine Cut Diamond
  • 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.