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Antique Victorian Gold Silver GIA 2.56ct Long Old Marquise Diamond Halo Ring
Located in Montclair, NJ
--Stone(s):-- (1) Natural Genuine Diamond - Long Old Marquise Cut - Brilliant - Prong Set - F Color
Category

Antique 19th Century Victorian Engagement Rings

Materials

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

Vintage Estate Platinum Marquise Cut Diamond Half Eternity Band, circa 1942
Located in Great Neck, NY
Circa 1942! Vintage Platinum half eternity band with 5 old marquise cut diamonds. #R0343 Metal
Category

Vintage 1940s Retro Band Rings

Materials

Diamond, Platinum

GIA 2.55 Carat Antique Old Marquise Diamond 3-Stone Wedding Yellow Gold
Located in New York, NY
Clear). Perfectly shaped Old Marquise cut's measurements are 13.14x6.15x3.03mm- HUGE!! The Center Stone
Category

Antique Late 19th Century Victorian Engagement Rings

Materials

Diamond, 18k Gold, Yellow Gold, Platinum

Antique Art Deco Platinum Old Cushion Cut Diamond Engagement Ring
Located in Great Neck, NY
Stunning Art Deco Engagement Ring featuring a stunning 1.05 carat old cushion cut diamond in the
Category

Vintage 1920s Art Deco Engagement Rings

Materials

Diamond, Platinum

Antique Edwardian Platinum Old Cut Diamond Filigree Shield Cocktail Ring - GIA
Located in Great Neck, NY
incredible Edwardian old cut diamond marquise filigree shield ring is crafted in platinum. The ring features
Category

Antique Early 1900s Edwardian Cocktail Rings

Materials

Diamond, Platinum

Geometric GIA 0.98 carat old mine cut diamond platinum engagement ring
Located in Beverly Hills, CA
Certificate: GIA #2231391426 Center stone: Old mine cut diamond Weight: 0.98 Carat Color: L
Category

Vintage 1930s Art Deco Engagement Rings

Materials

Diamond, Platinum

Retro 18k White Gold European Cut Diamond W/ Baguette Marquise Diamond Ring
Located in Montgomery, AL
Retro Italian Made 18k White Gold Round European Cut Center With Marquise Cut And Baguette Cut
Category

Vintage 1950s Italian Retro Fashion Rings

Materials

Diamond, 18k Gold, White Gold

GIA 1.31 Carat Classic Marquise Cut Diamond 3-Stone Wedding Plat/WG Ring
Located in New York, NY
This rare original Late Art Deco engagement ring with old-cut vintage Marquise** dated 1930. A very
Category

Vintage 1930s Art Deco Engagement Rings

Materials

Diamond, 14k Gold, White Gold, Platinum

Art Deco Marquise Cut Diamond Solitaire Ring, circa 1920s
Located in London, GB
Dating to the 1920s, this solitaire features a rare, old marquise cut, set to centre. The sparkling
Category

Vintage 1920s Unknown Art Deco Engagement Rings

Materials

Diamond, Platinum

Art Deco Platinum 2.50 Carat Old European Cut Natural Diamond Bracelet
Located in Baltimore, MD
Art Deco Platinum 2.50 Carat Old European Cut Natural Diamond Bracelet Metal: Platinum Weight
Category

Early 20th Century European Art Deco Retro Bracelets

Materials

Diamond, Platinum

Tiffany Co. Art Deco Asscher Old European Marquise Diamond Platinum Brooch Pin
By Tiffany Co.
Located in Boca Raton, FL
all old cut diamonds including Old European, Marquise, and Asscher. The center asscher cut diamond
Category

Early 20th Century Unknown Art Deco Brooches

Materials

Diamond, Platinum

Art Deco Platinum 8.00 Carat Old European Cut Natural Diamond Emerald Bracelet
Located in Baltimore, MD
Weight: 51.3 grams Diamonds: Approx. 8.00 CTW natural old European, single cut and marquise cut H-I VS-SI
Category

Early 20th Century Art Deco Retro Bracelets

Materials

Diamond, Emerald, Platinum

Antique Art Deco Platinum 8.35ctw Old Cut Diamond Dual Dress Clip Brooch Pendant
Located in Montclair, NJ
solid .900 platinum during the art deco period. Each clip is v-prong set with an old marquise cut
Category

Vintage 1920s Art Deco Brooches

Materials

Diamond, 18k Gold, Platinum

Antique Art Deco 18K White Gold Old Mine Cut Diamond and Sapphire Shield Ring
Located in Great Neck, NY
diamond is a champagne colored old mine cut. It has 3 marquise cut diamonds on each side of the filigree
Category

Vintage 1920s Unknown Art Deco Cocktail Rings

Materials

Diamond, Sapphire, 18k Gold, White Gold

1960s 5.44 Carat GIA Cert Marquise Cut Diamond Ring with Diamond Set Guard
Located in Beverly Hills, CA
Stunning super sparkling diamond ring featuring an old 5.44-ct marquise cut diamond of L color and
Category

Vintage 1960s Unknown Cocktail Rings

Materials

White Diamond, 14k Gold, 18k Gold, White Gold

Antique Edwardian Platinum GIA Old Cut Diamond Milgrain Engraved Engagement Ring
Located in Montclair, NJ
clean SI1 clarity. The ring is further adorned with old marquise cut diamonds bezel set on either side
Category

Antique Early 1900s Edwardian Engagement Rings

Materials

Diamond, Platinum

Antique Edwardian Platinum GIA Old Cut Diamond Milgrain Engraved Engagement Ring
Located in Montclair, NJ
clean SI1 clarity. The ring is further adorned with old marquise cut diamonds bezel set on either side
Category

Antique Early 1900s Edwardian Engagement Rings

Materials

Diamond, Platinum

Vintage Mid-Century Platinum 8.0ctw GIA Large Marquise Aquamarine Diamond Ring
Located in Montclair, NJ
incredible amount of shine due to its brilliant cutting style. The surrounding old single and marquise cut
Category

Vintage 1960s Cocktail Rings

Materials

Aquamarine, Diamond, Platinum

GIA Colorless 2.40ct Antique Marquise Diamond Edwardian Engagement Platinum Ring
Located in New York, NY
Original Antique GIA Colorless 2.40ct Old Marquise Cut Diamond Engagement Platinum Ring Few come
Category

Antique Early 1900s Edwardian Engagement Rings

Materials

Diamond, Platinum

Antique Art Deco Platinum .83ct Marquise Diamond Solitaire Accents Dinner Ring
Located in Montclair, NJ
ring features an approximately 0.24 carat solitaire, old marquise cut diamond neatly set at the center
Category

Vintage 1920s Art Deco Solitaire Rings

Materials

Diamond, Platinum

Vintage Platinum Marquise Bezel Round Diamond Open Dual Row Milgrain Band Ring
Located in Montclair, NJ
in-between. The ring features 6 old marquise cut diamond bezel stations that are equally spaced
Category

Vintage 1940s Band Rings

Materials

Diamond, Platinum

1.86 Carat Marquise Navette Diamond Platinum Engagement Ring GIA H/VS2 Solitaire
Located in Boca Raton, FL
Beautiful elongated marquise diamond engagement ring handcrafted in platinum. The old cut elongated
Category

Mid-20th Century American Art Deco Engagement Rings

Materials

Diamond, Platinum

Antique Art Deco 1.12 Carat Old Mine Diamond Engagement Ring
Located in Santa Barbara, CA
Mine Brilliant Color: M Clarity: VS2 Accents: 53 Diamonds: Old European Cuts 0.23 Carats 2 Marquise
Category

Vintage 1920s Art Deco Engagement Rings

Materials

Diamond, Ruby, Platinum

Antique Art Deco Platinum Old European Bezel Diamond Pendant w/ Cable Chain
Located in Montclair, NJ
diamonds throughout, all of which total approximately 2.28 carats in weight. An old European cut diamond is
Category

Vintage 1930s Art Deco Pendant Necklaces

Materials

Diamond, Platinum

Antique Art Deco Platinum 1.28ct Gia Graded Old European Diamond Engagement Ring
Located in Montclair, NJ
--Stone(s):-- (1) Natural Genuine Diamond - Old European Cut - Bead Pave Set - J Color - VS2
Category

Vintage 1920s Art Deco Engagement Rings

Materials

Diamond, Platinum

Art Deco 3.07 Carat GIA Marquise Diamond Platinum Engagement Ring
Located in Beverly Hills, CA
look that was sought after at this time. Featuring a 3.07 carat old marquise cut diamond that is
Category

Vintage 1930s American Art Deco Engagement Rings

Materials

Diamond, Platinum

Vintage Platinum Round Baguette Pear Marquise Diamond Chandelier Brooch Pendant
Located in Montclair, NJ
- VS2/SI1 Clarity - G/H Color - 1.65ctw (approx.) (5) Natural Genuine Diamonds - Old Marquise Cut - V
Category

Vintage 1960s Art Deco Brooches

Materials

Diamond, Platinum

Art Deco Style Mixed Cut Diamond Emerald Pear Cut Ruby White Gold Cocktail Ring
By Luigi Ferrara
Located in Naples, IT
European Cut, Cushion Cut, Marquise Cut, Heart Cut, Pear Cut and Modern Round Cut Diamonds. This Ring has a
Category

21st Century and Contemporary Italian Art Deco Cocktail Rings

Materials

Diamond, White Diamond, Emerald, Yellow Diamond, Brown Diamond, Ruby, 18...

Art Deco Style Mixed Cut Diamond Emerald Pear Cut Ruby White Gold Cocktail Ring
By Luigi Ferrara
Located in Naples, IT
and Yellow Old European Cut, Cushion Cut, Marquise Cut, Heart Cut, Pear Cut and Modern Round Cut
Category

21st Century and Contemporary Italian Art Deco Cocktail Rings

Materials

Diamond, White Diamond, Yellow Diamond, Brown Diamond, Emerald, Ruby, 18...

Art Deco Fancy Cut Diamond Platinum Clip Brooch
Located in Los Angeles, CA
. Mounted in platinum, set with baguette, marquise, old European-cut and one triangular cut diamond together
Category

Vintage 1920s Art Deco Necklace Enhancers

Materials

Diamond, Platinum, White Gold

Edwardian Era 1.67 Carat GIA Certified E/VS1 Moval Cut Diamond Engagement Ring
Located in Los Angeles, CA
high-quality old cut diamond (an oval marquise shape), GIA certified as a Marquise Brilliant Cut graded
Category

Vintage 1910s Unknown Edwardian Engagement Rings

Materials

Diamond, Platinum

Art Deco Emerald and Diamond Bracelet
Located in Hummelstown, PA
This sensational Art Deco bracelet is comprised of three segments, each centered by an old marquise
Category

Vintage 1920s Tennis Bracelets

Materials

Diamond, Platinum

Tiffany Co Platinum Vintage Diamond Ring 0.50ct
By Tiffany Co.
Located in SYDNEY, NSW
Marquise shape old cut Diamond in an open back half rubover and claw setting with an approximate weight of
Category

Vintage 1970s Engagement Rings

Materials

Diamond, Platinum

Diamond by the Yard Platinum Chain Necklace Art Deco Revival
Located in Beverly Hills, CA
with twelve old marquise cut diamonds (H-J color, VS clarity, each weighs in average approximately 0.35
Category

Vintage 1950s Unknown Chain Necklaces

Materials

Diamond, Platinum

Antique Art Deco Platinum 3.09ct Pave Diamond w/ Dangle Circle Wreath Pin Brooch
Located in Montclair, NJ
(approx.) (1) Natural Genuine Diamond - Old Marquise Cut - Bezel Set w/ Milgrain - E/F Color - VS1 Clarity
Category

Vintage 1920s Art Deco Brooches

Materials

Diamond, Platinum

Art Deco Fancy Colour Diamond Brooch, circa 1930
Located in London, GB
Art Deco fancy colour diamond brooch. Set to centre with a marquise shape old cut natural brown
Category

Vintage 1930s Brooches

Materials

Diamond, Brown Diamond, Platinum

Art Deco Platinum Diamond Sapphire Bracelet 5.5 Carats
Located in Montgomery, AL
Details: 5 - Old Marquise Cut Diamonds; FG Color; SI1 Clarity; Approximately 0.5 Carat Each 130 - Old Cut
Category

Vintage 1920s Art Deco Link Bracelets

Materials

Diamond, Sapphire, Platinum

Art Deco, Diamond, Sapphire and Emerald Bracelet
Located in Chicago, IL
This unique Art Deco bracelet contains numerous old European, transitional and marquise cut
Category

Vintage 1920s Art Deco Link Bracelets

Materials

Diamond, Sapphire, Emerald, Platinum

Antique Art Deco Diamond Ring Platinum Square Embossed Cocktail Vintage
Located in Torrance, CA
. Centrally mounted estimated 0.25 carat old Marquise cut diamond is accented with a further 12 estimated 0.01
Category

Early 20th Century Unknown Art Deco Cocktail Rings

Materials

Diamond, Platinum

Art Deco 8.00 Carat Diamonds Platinum Bracelet
Located in Beverly Hills, CA
One Art Deco 8.00 Carat Diamonds Platinum Bracelet. Featuring three old marquise (moval) cut
Category

Vintage 1930s Unknown Art Deco Link Bracelets

Materials

Diamond, Platinum

GIA 2.89 carat diamond sapphire 18k white gold engagement ring
Located in Beverly Hills, CA
This modern engagement ring radiates striking elegance with its rare Marquise Old Mine Cut diamond
Category

20th Century Modern Engagement Rings

Materials

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

Antique Art Deco Platinum Diamond Bracelet
Located in Beverly Hills, CA
an elongated geometric motif with a vertical baguette diamond flanked by marquise cuts, framed in old
Category

Vintage 1920s Unknown Art Deco Tennis Bracelets

Materials

Diamond, White Diamond, Platinum

Antique French 1920s 1.39 Carat Diamond and Sapphire Platinum Dress Ring
Located in Jesmond, Newcastle Upon Tyne
design is ornamented with a central bezel set 0.80 Ct Old European marquise cut diamond. Six calibre cut
Category

Vintage 1920s French Art Deco Cocktail Rings

Materials

Diamond, Sapphire, Platinum

Art Deco Diamond an Sapphire Necklace, circa 1930s
Located in Wailea, HI
Art Deco Diamond an Sapphire Necklace Circa 1930's One Old Mine Marquise Cut Diamond Weighing .90
Category

Early 20th Century Unknown Art Deco Drop Necklaces

Materials

White Diamond, Blue Sapphire, Platinum

Art Deco Antique Platinum 7.00 Carat Natural Diamond Bracelet
Located in Baltimore, MD
Diamonds: Approx. 7.00 CTW natural marquise, old European cut, baguette H-I VS diamonds Length: 7.25 inches
Category

Early 20th Century European Art Deco Retro Bracelets

Materials

Diamond, Platinum

Antique 1920s Art Deco 4.90 Carat Diamond and Platinum Brooch
Located in Jesmond, Newcastle Upon Tyne
/P1 Cut Marquise/Old European/Eight/Baguette Content 4.32 carats Total Diamond Content 4.90 carats
Category

Vintage 1920s Unknown Art Deco Brooches

Materials

Diamond, Platinum

Tiffany Co. diamond necklace, American, circa 1920
By Tiffany Co.
Located in London, GB
setting with an approximate weight of 1.10 carats, further set with a marquise shape old cut diamond in an
Category

Vintage 1920s American Art Deco Chain Necklaces

Materials

Diamond, Platinum

Antique Diamond White Gold Pendant, circa 1920
Located in Jesmond, Newcastle Upon Tyne
(average grades) I/J Clarity (average grades) VS 2 - SI 2 Cut Old European/marquise/rose Content (total
Category

Vintage 1920s Unknown Drop Necklaces

Materials

Diamond, 18k Gold, White Gold

Edwardian 1.60 Carat Diamond Platinum-Topped 14 Karat Gold Navette Dinner Ring
Located in Philadelphia, PA
throughout with old European cut and marquise cut diamonds weighing approximately 1.60 carats total, G to J
Category

Early 20th Century Edwardian Cocktail Rings

Materials

White Diamond, 14k Gold, Yellow Gold, Platinum

c1920s Vintage Art Deco Diamond Band Sz 5.25 Platinum Wide Ring Eternity Jewelry
Located in Torrance, CA
old mine cut diamonds (round and marquise) total an estimated 1.50 carats (estimated at I-J color and
Category

Early 20th Century American Modern Band Rings

Materials

Diamond, White Diamond, Platinum

18 Karat Gold Diamond White and Green Enamel Ruby Wrap Serpent Snake Pin Brooch
Located in Montclair, NJ
- Old Marquise Cut - Bezel Set - Blood Red Color - 0.22ctw (approx.) Total Carat Weight: 0.74 (approx
Category

Vintage 1970s Brooches

Materials

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

Ruby Diamond Drop Earrings
Located in London, GB
A pair of diamond and ruby drop earrings set with old-cut, baguette, marquise and drop shape
Category

Mid-20th Century Indian Art Deco Drop Earrings

Materials

Diamond, Ruby

Art Deco Diamond and Sapphire Dinner Ring, circa 1920s
Located in London, GB
Weight: 1.10 centre + 0.40 Stone Shape: Emerald Cut, Marquise, Old Cut Colour: G Clarity: VS Age: 1920s
Category

Vintage 1920s Unknown Art Deco Engagement Rings

Materials

Diamond, Sapphire, Platinum

Important 21.25 Carat Diamond Platinum Bracelet
Located in Miami, FL
Marquise Cut Diamonds H Color, VS Clarity.
Category

Vintage 1920s American Art Deco More Bracelets

Materials

Diamond, Platinum

Art Deco Diamond Platinum Brooch
Located in London, GB
An Art Deco, diamond single clip brooch, set with old-cut, baguette-cut and marquise-cut diamonds
Category

Vintage 1930s Art Deco Brooches

Materials

Diamond, Platinum

Bespoke Multi Stone Butterfly Brooch / Pendant
Located in SYDNEY, NSW
Featuring twenty (20) round brilliant cut, old European cut, marquise, oval, baguette and pear
Category

21st Century and Contemporary Brooches

Materials

Diamond, Emerald, Sapphire, Tourmaline, Yellow Gold, Rhodium

Art Deco Diamond Bracelet
Located in New York, NY
7carats and old european-cut, single-cut, baguette, marquise-shaped and triangular-shaped diamonds
Category

Vintage 1930s Unknown Art Deco Link Bracelets

Materials

Diamond, Emerald, Platinum

  • 1
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Old Cut Marquise For Sale on 1stDibs

Surely you’ll find the exact old cut marquise 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 platinum, gold and 18k gold — can elevate any look. Find an antique version now, or shop for 451 vintage or 17 modern creation for a more contemporary example of these cherished accessories. Making the right choice when shopping for an old cut marquise may mean carefully reviewing examples of this item dating from different eras — you can find an early iteration of this piece from the 18th Century and a newer version made as recently as the 21st Century, both of which have proven very popular over the years. For this particular piece, .5 carat and 1 carat are consistently popular carat weights. An old cut marquise from Tiffany Co., J.E. Caldwell Co. and Luigi Ferrara — each of whom created a beautiful version of this treasured accessory — is worth considering. A marquise cut version of this piece has appeal, but there are also old european cut and old mine cut versions for sale. When shopping for an old cut marquise, you’ll find that there are less available pieces for unisex or men today than there are for women.

How Much is an Old Cut Marquise?

The price for an old cut marquise starts at $1 and tops out at $1,046,250 with these rings, on average, selling for $7,094.

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 Cut Marquise
  • 1stDibs ExpertFebruary 13, 2023
    Marquise cut diamonds can be less expensive per carat compared to other popular diamond shapes. The 4Cs, the grading system that was established by the Gemological Institute of America (GIA) in the 1950s, are the guidelines that determine how marquise diamonds are graded. The price of marquise cut diamonds will be affected by market conditions as well as the aforementioned 4Cs, which are carat weight, color, clarity, and cut quality. Find a collection of diamond jewelry on 1stDibs.
  • 1stDibs ExpertMay 5, 2023
    How old an old European-cut diamond is varies. The old European cut is a precursor to the modern round brilliant cut. The stone appears circular when looked at from the top (because of its low table or largest facet) and has a high crown (the part above the middle of the stone) with larger facets. The tip of the stone, or the culet, is flat instead of pointed. This style was used predominantly in the 19th century, hence the name. It is best to consult a certified appraiser for assistance with dating and identifying antique jewelry. On 1stDibs, find a variety of European-cut diamond jewelry.
  • 1stDibs ExpertOctober 19, 2021
    A marquise-cut diamond looks great in a variety of settings, but you should choose one that protects the center stone. Some of the top marquise diamond ring settings are bezel, prong and halo. Find a variety of marquise-cut diamond rings on 1stDibs today.
  • 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
    Although old European cut diamonds are often priced lower than modern cuts, due to scarcity, they can sometimes be more valuable than modern cut diamonds.
  • 1stDibs ExpertApril 5, 2022
    Jewelry makers stopped using the old European cut for diamond and other gemstone jewelry around 1930. The style was common during the Art Deco period, but the brilliant cut became popular in the years that followed. On 1stDibs, shop a selection of Old European cut diamond gemstone jewelry.
  • 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 ExpertAugust 24, 2021
    Yes, old European cut diamonds can be worth more than many other cut diamonds as they are not produced anymore. This cut was developed and popularized between the years 1890 and 1930 and is likely to be found in an antique ring belonging to this period and featuring a round-cut diamond.
  • 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.