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Ladies Platinum Princess Diamond Semi Mount Engagement Ring
Located in Houston, TX
Ladies platinum diamond engagement ring with a half round shank. Engraved with "PLAT". The semi mount can
Category

21st Century and Contemporary Unknown Engagement Rings

Materials

Diamond, Platinum

Ladies Platinum Diamond Oval Semi Mount Engagement Ring
Located in Houston, TX
Ladies 950 platinum diamond engagement semi-mount ring with a half round shank. Engraved with "PLAT
Category

21st Century and Contemporary Unknown Engagement Rings

Materials

Diamond, Platinum

Ladies Platinum Halo Accented Diamond Round Semi Mount Engagement Ring
Located in Houston, TX
Ladies platinum diamond halo accented semi-mount engagement ring with a half round shank. The metal was
Category

21st Century and Contemporary Unknown Engagement Rings

Materials

Diamond, Platinum

Ladies Platinum Oval Accented Emerald Cut Diamond Semi Mount Engagement Ring
Located in Houston, TX
polished 950 platinum, diamond engagement, semi-mount, accented ring with a tapered, comfort-fit shank. The
Category

21st Century and Contemporary Unknown Solitaire Rings

Materials

Diamond, Platinum

Scott Kay Diamond Engagement Ring Semi Mount Tapered Baguettes 0.28tcw Platinum
By Scott Kay
Located in San Diego, CA
Brand: Scott Kay Style: Solitaire with Baguettes Semi Mount Metal: Platinum Size: 6.75 - sizable
Category

2010s American Engagement Rings

Materials

Diamond, Platinum

Ladies Platinum Marquee Hidden Halo Accented Diamond Semi Mount Engagement Ring
Located in Houston, TX
engagement hidden halo semi-mount ring with a half round shank. Engraved with "PLAT". The semi mount can
Category

21st Century and Contemporary Unknown Cocktail Rings

Materials

Diamond, Platinum

Tacori Ladies Platinum Squared Three Stone Diamond Semi Mount Engagement Ring
By Tacori
Located in Houston, TX
Ladies platinum diamond semi-mount engagement three-stone ring with a half round shank. Engraved with
Category

21st Century and Contemporary Unknown Engagement Rings

Materials

Diamond, Platinum

Ladies 18K White Gold Platinum Princess Cut Diamond Semi Mount Engagement Ring
Located in Houston, TX
Weight: 6.32 grams Ladies 18K white gold and platinum diamond accented engagement semi-mount ring with a
Category

21st Century and Contemporary Unknown Engagement Rings

Materials

Diamond, White Gold, Platinum

Amavida Platinum Engagement Mounting With Semi Halo
By Gabriel & Co.
Located in Stamford, CT
This platinum engagement ring is rich in design reminiscent of early 20th century English jewelry
Category

2010s Engagement Rings

Materials

Diamond, Platinum

New Tacori 3 Stone Engagement Ring Platinum Size 6.5 Semi Mount Heart 10936
By Tacori
Located in McLeansville, NC
This beautiful NEW Tacori engagement ring has a semi mount 3-stone design. The center is set with a
Category

2010s Engagement Rings

Materials

Diamond, Platinum

New Tacori Emerald Cut 3 Stone Engagement Ring 18k Gold Platinum Semi Mount 2199
By Tacori
Located in McLeansville, NC
This beautiful NEW Tacori engagement ring is a semi mount 3-stone design currently set with a 1
Category

2010s Engagement Rings

Materials

Diamond, 18k Gold, Platinum

New Semi-Mount Engagement Ring, 18k Gold & Platinum Fits w/Dias .33ctw
Located in Greensboro, NC
This ring is a size 6 1/2 - 6 3/4. Metal Content: Guaranteed 18k Gold & Platinum as stamped Stone
Category

Late 20th Century Unknown Engagement Rings

Materials

18k Gold, Platinum

1.20ct Natural Semi Black Opal Diamond Ring Estate Platinum Sz 6 Fine Jewelry
Located in Torrance, CA
Stylish natural semi-black opal & diamond ring (circa 2000s) crafted in platinum. Natural opal
Category

21st Century and Contemporary American Contemporary Cocktail Rings

Materials

Diamond, White Diamond, Opal, Black Opal, Platinum

1.01 Carat E VS2 Diamond Platinum Solitare Engagement Ring
Located in London, GB
This exquisite engagement ring features a wonderful 1.01ct round brilliant cut diamond, certified E
Category

2010s English Modern Engagement Rings

Materials

Diamond, Platinum

Tiffany & Co Engagement Wedding Anniversary Band Ring Diamond .35ct Platinum
By Tiffany & Co.
Located in Dearborn, MI
Tiffany & Co Engagement Wedding Anniversary Band Ring Diamond .35ct Platinum Tiffany & Co
Category

2010s Wedding Rings

Materials

Diamond, Platinum

Platinum & 18K Yellow Gold Diamond Engagement Ring 0.40 ctw
Located in Houston, TX
professional jewelers. The semi-mount can accommodate a round or cushion cut stone with a diameter between
Category

21st Century and Contemporary Engagement Rings

Materials

Diamond, 18k Gold, Yellow Gold, Platinum

Peter Suchy GIA Transitional Cut Diamond Sapphire Platinum Engagement Ring
By Peter Suchy
Located in Stamford, CT
Antique Inspired diamond and sapphire engagement ring. GIA certified transitional cut diamond
Category

21st Century and Contemporary Engagement Rings

Materials

Diamond, Sapphire, Platinum

GIA Certified 4.09-Carat White Opal and Diamond Halo in Platinum and Gold Ring
Located in Miami, FL
yellow gold ring shank that integrates with a platinum halo prong mounting. A truly drop-dead gorgeous
Category

2010s Art Deco Cocktail Rings

Materials

Diamond, Opal, Gold, Platinum

GIA Certified 4.09-carat White Opal and Diamond Halo in Platinum and Gold Ring
Located in Miami, FL
yellow gold ring shank that integrates with a platinum halo prong mounting. A truly drop-dead gorgeous
Category

2010s Art Deco Cocktail Rings

Materials

Diamond, Opal, Gold, Platinum

Art Deco 1930 Cocktail Bombe Ring In Platinum With 3.19 Ctw Diamonds And Emerald
Located in Miami, FL
An art deco platinum cocktail ring. Beautiful antique cocktail ring, created in America during the
Category

Vintage 1930s American Art Deco Cocktail Rings

Materials

Emerald, White Diamond, Diamond, Platinum

Platinum Fine Antique Oval GIA Reddish Orange Coral & Mine Cut Diamond Ring
Located in Montclair, NJ
This truly unique statement ring was newly crafted from solid 950 platinum. The ring features an
Category

2010s American Art Deco Cocktail Rings

Materials

Coral, Platinum

1.50 Carat Old European Diamond Platinum Art Deco Three-Stone Engagement Ring
Located in Stamford, CT
1930's Art Deco three-stone diamond ring. 1.00ct Old European cut diamond center stone. Mounted in
Category

Early 20th Century Three-Stone Rings

Materials

Diamond, Platinum

Art Deco 3.30 Carat Diamond and Onyx Ring, circa 1920s
Located in London, GB
This stunning and elegant solitaire ring, features a beautifully hand cut old cut diamond. Weighing
Category

Vintage 1920s Unknown Art Deco Engagement Rings

Materials

Diamond, Onyx, Platinum

Three-Stone Engagement Ring Tri-Color Platinum 18 Karat Yellow and 18 Karat Gold
By Rock N Gold Creations
Located in Rancho Santa Fe, CA
Three Stone Engagement Ring Tri-Color Platinum, 18tk Yellow Gold and 18kt Rose Gold Round Diamond
Category

2010s American Contemporary Engagement Rings

Materials

Rose Gold, Yellow Gold, Platinum, 18k Gold

GIA Certified 2.5 Carat Oval Cut Tsavorite and Diamond Overpass Crossover Ring
Located in Miami, FL
GIA Certified Green 2.50 Carat Tzavorite and Diamond Overpass 18K Gold and Platinum Ring. Signed by
Category

Late 20th Century North American Retro Cocktail Rings

Materials

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

GIA Certified 3.46 Carat Fancy Yellow and Diamond Ring
Located in Delray Beach, FL
A 3.46 carat fancy yellow diamond is the focal point of this exquisite ring. At its center, this
Category

2010s Unknown Modern Fashion Rings

Materials

Diamond, Yellow Diamond, 18k Gold, Yellow Gold

Art Deco 3.82ct Sapphire and Diamond Cluster Ring, circa 1930s
Located in London, GB
is Cabochon cut and mounted in platinum. Decorative metal work features at the top and bottom of the
Category

Vintage 1920s Unknown Art Deco Cluster Rings

Materials

Sapphire, Diamond, 18k Gold

Wedderien 1928 Art Deco Carved Jade Clip Platinum 12.51 Cts Diamonds & Sapphires
Located in Miami, FL
. Diamonds: Mount with 22 round European cut diamonds, 0.55 carats, white colorless F color, VS-2 clarity
Category

Vintage 1920s American Art Deco Brooches

Materials

Diamond, White Diamond, Jade, Sapphire, Blue Sapphire, Star Sapphire, Pl...

4.5 Carat Diamond "Mad Heart" Pendant in Platinum with Silver Akoya Pearls
Located in Sherman Oaks, CA
milady accidentally puncturing herself with those pointy platinum stems! We purchased this brooch many
Category

Late 20th Century North American Contemporary Pendant Necklaces

Materials

Cultured Pearl, Pearl, White Diamond, Diamond, Platinum, White Gold, 14k...

French 1900 Edwardian Natural Pearls Necklace In 18Kt Gold With Diamonds & Ruby
Located in Miami, FL
and topped with a layer of platinum for the setting of the diamonds. The settings are finished with
Category

Antique Early 1900s French Edwardian Beaded Necklaces

Materials

White Diamond, Pearl, Natural Pearl, Ruby, Diamond, Gold, 18k Gold, Yell...

Verger Freres 1901 Spaulding & Co Edwardian Watch-Pendant Guilloche 18Kt Diamond
Located in Miami, FL
magnificent watch pendant, created by Ferdinand Verger Freres in platinum, 18 karats yellow gold, diamonds
Category

Antique Early 1900s French Edwardian More Jewelry

Materials

Diamond, 18k Gold, Yellow Gold, Platinum

Edwardian 1910 Natural Pearls Necklace In 18Kt Gold With Diamonds And Sapphires
Located in Miami, FL
millegrain design. Diamonds: Mounted in millegrain settings, with 10 European rose cut diamonds, 0.30 carats
Category

Vintage 1910s English Edwardian Beaded Necklaces

Materials

Diamond, White Diamond, Pearl, Natural Pearl, Sapphire, Blue Sapphire, G...

Long Dangling Diamond Teardrop White Gold Earrings by Odelia
By Odelia
Located in Miami Beach, FL
brand was born! Odelia is a full jewelry line featuring bridal and fashion jewelry; semi-mounts, bands
Category

21st Century and Contemporary American Dangle Earrings

Materials

Diamond, White Gold, 18k Gold

Art Deco 1920 Mughal Tutti Frutti Necklace Silver 303.69 Cts Gemstone And Pearls
Located in Miami, FL
French platinum and diamond mountings. The style became extremely popular during the 1920's, but it
Category

Vintage 1920s English Art Deco Beaded Necklaces

Materials

Onyx, Pearl, Blue Sapphire, Tourmaline, Fluorite, Gold, 18k Gold, Yellow...

Art Deco Ruby Diamond Platinum Cocktail Ring
Located in London, GB
-cut diamond separating two rows of three calibre-cut rubies set in raised semi-circular mounts to
Category

Early 20th Century British Art Deco Cocktail Rings

Materials

Diamond, Ruby, Platinum

Tacori Diamond Semi Mount Ring in Platinum
By Tacori
Located in Vienna, VA
Tacori Semi Mount Ring w/Diamonds and a CZ Center in Platinum Tacori Semi Mount Ring .950 Platinum
Category

21st Century and Contemporary More Rings

Materials

Diamond, Platinum

Martin Flyer Semi Mount Diamond Ring in Platinum
By Martin Flyer
Located in Vienna, VA
Martin Flyer Semi Mount Diamond Ring in Platinum Martin Flyer Semi Mount Ring Platinum Accent
Category

21st Century and Contemporary More Rings

Materials

Diamond, Platinum

Platinum Pear Shaped Diamond Semi Mount
By Michael Barin
Located in Carmel by the Sea, CA
Platinum Diamond Ring with a Pear Shaped Center Stone, accented with Ideal Cut Micro Pave Diamonds
Category

21st Century and Contemporary American Contemporary Engagement Rings

Materials

Diamond, White Diamond, Platinum

Scott Kay Diamond Halo Semi Mount Ring in 19K and Platinum
By Scott Kay
Located in Vienna, VA
Scott Kay Diamond Halo Semi Mount Ring in 19K/Platinum Scott Kay Diamond Semi Mount Ring 19K White
Category

21st Century and Contemporary More Rings

Materials

Diamond, 18k Gold, Platinum

Diamond Platinum Engagement Ring
By Michael Barin
Located in Carmel by the Sea, CA
elegant and stunning. Please note, our price here reflects the platinum semi-mount only. Please
Category

21st Century and Contemporary American Contemporary Engagement Rings

Materials

White Diamond, Platinum

Halo Diamond Platinum Engagement Ring
By Michael Barin
Located in Carmel by the Sea, CA
remain forever without boundaries. Please note, our price here reflects the platinum semi-mount only
Category

21st Century and Contemporary American Contemporary Engagement Rings

Materials

White Diamond, Platinum

Edwardian Diamond Sapphire and Platinum Ring
Located in Melbourne, Victoria
early Brilliant cut diamond and surrounded with an oval of diamonds within a very fine platinum mount
Category

Vintage 1910s Unknown Edwardian Cluster Rings

Materials

Diamond, Sapphire, Platinum

Platinum Art Deco Ring with Certified Pearl and Diamonds, circa 1920
Located in Antwerp, BE
Period: ca. 1920 Material: platinum Diamond(s): 12 single brilliant cut diamonds (also called 8/8
Category

Vintage 1920s Belgian Art Deco Engagement Rings

Materials

Diamond, White Diamond, Pearl, Platinum

Certified Heat Treated Natural Ruby 3.19 Carat Diamond Platinum Ring France 1920
Located in Antwerp, BE
. 1920 Material: platinum Diamond(s): 30 old brilliant cut diamonds and single brilliant cut diamonds
Category

Vintage 1920s French Art Deco Engagement Rings

Materials

Diamond, White Diamond, Ruby, Platinum

12.85 Carat Cushion Cut Diamond Ring
By Shreve, Crump & Low
Located in Chestnut Hill, MA
Platinum Diamond ring, featuring one 12.85 carat Cushion cut diamond set into a handmade, hand
Category

21st Century and Contemporary Romantic Engagement Rings

Materials

Diamond, White Diamond, Platinum

2 Carat Fancy Yellow Canary Cushion Double Halo Diamond Engagement Ring
Located in Aliso Viejo, CA
custom platinum mounting that has over 1.5 carats. The round brilliant diamonds range in color from F-G
Category

2010s American Modern Engagement Rings

Materials

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

Double Halo Diamond French Cut Sapphire Platinum Engagement Ring
Located in Boston, MA
engagement ring set in luxurious platinum. Centered by a beautiful European cut diamond, this ring features
Category

21st Century and Contemporary Engagement Rings

Materials

Diamond, Blue Sapphire, Platinum

Fantastic 0.80 Carat Diamond Filigree Engagement Ring in Platinum
Located in Boston, MA
with petite platinum beads. Framing the ring, a trio of diamonds can be found on each side of the band
Category

21st Century and Contemporary Engagement Rings

Materials

Diamond, Platinum

Spectacular Art Deco 1.05 Carat Diamond Sapphire Platinum Engagement Ring
Located in Boston, MA
An exceptional art deco period diamond, and sapphire engagement ring crafted in luxurious platinum
Category

Early 20th Century Art Deco Engagement Rings

Materials

Diamond, Blue Sapphire, Platinum

Platinum Diamond Wedding Semi Mount Ring
By Gregory Mikaelian & Sons, Inc.
Located in Los Angeles, CA
Platinum diamond wedding semi mount ring, containing 30 round full cut diamonds weighing .31pts
Category

Early 2000s American Contemporary Engagement Rings

Materials

Diamond, Platinum

Platinum Diamond Semi Mount Ring with Princess Cut Diamonds
By Gregory Mikaelian & Sons, Inc.
Located in Los Angeles, CA
Platinum diamond semi mount ring, containing 12 princess cut diamonds of very fine quality weighing
Category

2010s American Contemporary Engagement Rings

Materials

Diamond, Platinum

Tacori Platinum Semi Mount Ring with Diamonds .30 Carat
By Tacori
Located in Los Angeles, CA
This is a very beautiful platinum ring mounting with melee diamonds 0.30ct in total weight with
Category

2010s American Contemporary Engagement Rings

Materials

Diamond, Platinum

Tacori Square Engagement Ring Platinum Diamond Semi Mount Jewelry
By Tacori
Located in Torrance, CA
Elegant & finely detailed Tacori engagement ring crafted in 900 platinum. Centrally mounted cubic
Category

Mid-20th Century Unknown Modern Engagement Rings

Materials

White Diamond, Platinum

Pave Diamond Ruby Engagement Ring Platinum 18 Karat Yellow Gold Semi-Mount Ring
By Rock N Gold Creations
Located in Rancho Santa Fe, CA
Brand new ring design by Rock N Gold Creations. Platinum and 18kt yellow gold semi-mount ring will
Category

Early 2000s American Contemporary Engagement Rings

Materials

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

Estate 0.68 TCW Diamond Platinum fits 7ct Semi-Mount Three-Stone Band Ring
Located in New York, NY
Semi-Mount Opening: 12 mm (fits 7 ct round) Ring Size: 4.5 Hallmark: Irid.Plat ITEM #:BR-1078-101823
Category

21st Century and Contemporary Band Rings

Materials

Diamond, Platinum

Jose Hess Platinum and Diamond Engagement Ring Mounting
By Jose Hess
Located in Southampton, PA
This incredibly wonderful bridal and semi-mount ring from the brilliant Jose Hess is beautifully
Category

21st Century and Contemporary Band Rings

Materials

Diamond, Platinum

Jose Hess, .60 Carat Platinum and Diamond Pave Engagement Ring Mounting
By Jose Hess
Located in Southampton, PA
This elegant and preciously chic engagement semi-mount ring from the incredible Jose Hess features
Category

21st Century and Contemporary Band Rings

Materials

Diamond, Platinum

Jadeite Jade Diamond Platinum Ring
Located in Beverly Hills, CA
A natural Jadeite Jade ring set in a hand fabricated platinum mounting. The jade weighs
Category

21st Century and Contemporary American Cocktail Rings

Materials

Diamond, Jade, Platinum

LB Exclusive 18 Karat White Gold and Diamond Semi-Mount 8-Stone Ring ED-9717
By LB Exclusive
Located in Southampton, PA
diamonds on various colors of 18K gold or platinum. 18K White gold semi-mount engagement ring is fabulous
Category

21st Century and Contemporary Band Rings

Materials

Diamond, White Gold

Platinum Diamond Wedding Set
Located in Towson, MD
weight with matching H/I color and SI clarity. The platinum semi-mount (stamped PT950 Gabriel&Co. S169671
Category

21st Century and Contemporary Contemporary Wedding Rings

Materials

Diamond, Platinum

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Semi Mount Platinum Diamond Ring For Sale on 1stDibs

Find the exact semi mount platinum 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 Platinum, 18k Gold and Gold — can elevate any look. In our selection of items, you can find a vintage example as well as a contemporary version. Making the right choice when shopping for a semi mount platinum diamond ring may mean carefully reviewing examples of this item dating from different eras — you can find an early iteration of this piece from the 20th Century and a newer version made as recently as the 21st Century, both of which have proven very popular over the years. A semi mount platinum diamond ring from Tacori, Gregory Mikaelian & Sons, Inc. and Martin Flyer — each of whom created a beautiful version of this treasured accessory — is worth considering. See these pages for a round cut iteration of this accessory, while there are also emerald cut cut and princess cut cut versions available here, too. There aren’t many items for men if you’re seeking a semi mount platinum diamond ring, as most of the options available are for women and unisex.

How Much is a Semi Mount Platinum Diamond Ring?

The price for a semi mount platinum diamond ring starts at $900 and tops out at $9,200 with these rings, on average, selling for $2,097.

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.