COSMA COLLECTION - ENGAGEMENT RINGS

A harmonious union of form and stone. Seamlessly integrated metal and stone highlight the diamond’s native silhouette, allowing its natural beauty to take center stage in a fluid, uninterrupted design.

Asscher Diamond Cosma Ring
18k yellow gold tapering gold band - with a bezel set asscher cut diamond
Close-up of the model's arm and hand wearing a tapering gold band with an asscher cut diamond
18K Yellow Gold
18K Rose Gold
18K White Gold
Platinum
  • Asscher
  • Asscher
  • Asscher
  • Asscher

From $5,880.00 USD

Three Stone Deco Ring
A 18k yellow gold ring featuring a central asscher-cut diamond flanked by two baguette-cut side stones
A yellow gold ring featuring a central asscher-cut diamond flanked by two baguette-cut side stones, set horizontally against a light beige background
18k Yellow Gold
18k White Gold
18k Rose Gold
Platinum
  • Asscher
  • Asscher
  • Asscher
  • Asscher

From $12,000.00 USD

Cosma Diamond Ring
Cosma Diamond Ring
Cosma Diamond Ring
18K Yellow Gold
18K White Gold
18K Rose Gold
Platinum
  • Round
  • Round
  • Round
  • Round

From $5,880.00 USD

Cosma Deco Ring
Cosma Deco Ring
Cosma Deco Ring
18K Yellow Gold
18K White Gold
18K Rose Gold
Platinum
  • round
  • round
  • round
  • round

From $8,320.00 USD

Radiant Diamond Cosma Ring
Radiant Diamond Cosma Ring
Radiant Diamond Cosma Ring
18K Yellow Gold
18K White Gold
18K Rose Gold
Platinum

From $5,880.00 USD

Emerald E/W Diamond Cosma Ring
a 18k yellow gold ring with a east west emerald cut diamond as the center stone
Close-up of a woman's hand with a 18k white gold ring, with a east west emerald cut diamond as the center stone, on her finger, touching her face.
18K Yellow Gold
18K White Gold
18K Rose Gold
Platinum

From $5,800.00 USD

Asscher Cosma Deco Ring
A 18k yellow gold signet ring featuring a large, bezel-set asscher cut diamond, against a clean background.
Asscher Cosma Deco Ring
18K Yellow Gold
18K White Gold
18K Rose Gold
Platinum
  • Asscher
  • Asscher
  • Asscher
  • Asscher

From $8,400.00 USD

Emerald Diamond Cosma Ring
a 18k yellow gold ring with a emerald cut diamond center stone
a 18k yellow gold ring with a emerald cut diamond center stone against a light grey background
18K Yellow
18K Rose
18K White
Platinum
  • Emerald
  • Emerald
  • Emerald
  • Emerald

From $5,800.00 USD

Radiant E/W Diamond Cosma Ring
Radiant E/W Diamond Cosma Ring
Radiant E/W Diamond Cosma Ring
18K Yellow Gold
18K White Gold
18K Rose Gold
Platinum

From $5,800.00 USD

Cosma Oval Diamond Ring
Cosma Oval Diamond Ring
Cosma Oval Diamond Ring
18K Yellow Gold
18K White Gold
18K Rose Gold
Platinum
  • Oval
  • Oval
  • Oval
  • Oval

From $5,880.00 USD

Asscher Diamond Cosma Ring
18k yellow gold tapering gold band - with a bezel set asscher cut diamond
Close-up of the model's arm and hand wearing a tapering gold band with an asscher cut diamond
18K Yellow Gold
18K Rose Gold
18K White Gold
Platinum
  • Asscher
  • Asscher
  • Asscher
  • Asscher

From $5,880.00 USD

Emerald E/W Diamond Cosma Ring
a 18k yellow gold ring with a east west emerald cut diamond as the center stone
Close-up of a woman's hand with a 18k white gold ring, with a east west emerald cut diamond as the center stone, on her finger, touching her face.
18K Yellow Gold
18K White Gold
18K Rose Gold
Platinum

From $5,800.00 USD

Three Stone Deco Ring
A 18k yellow gold ring featuring a central asscher-cut diamond flanked by two baguette-cut side stones
A yellow gold ring featuring a central asscher-cut diamond flanked by two baguette-cut side stones, set horizontally against a light beige background
18k Yellow Gold
18k White Gold
18k Rose Gold
Platinum
  • Asscher
  • Asscher
  • Asscher
  • Asscher

From $12,000.00 USD

Asscher Cosma Deco Ring
A 18k yellow gold signet ring featuring a large, bezel-set asscher cut diamond, against a clean background.
Asscher Cosma Deco Ring
18K Yellow Gold
18K White Gold
18K Rose Gold
Platinum
  • Asscher
  • Asscher
  • Asscher
  • Asscher

From $8,400.00 USD

Cosma Diamond Ring
Cosma Diamond Ring
Cosma Diamond Ring
18K Yellow Gold
18K White Gold
18K Rose Gold
Platinum
  • Round
  • Round
  • Round
  • Round

From $5,880.00 USD

Emerald Diamond Cosma Ring
a 18k yellow gold ring with a emerald cut diamond center stone
a 18k yellow gold ring with a emerald cut diamond center stone against a light grey background
18K Yellow
18K Rose
18K White
Platinum
  • Emerald
  • Emerald
  • Emerald
  • Emerald

From $5,800.00 USD

Cosma Deco Ring
Cosma Deco Ring
Cosma Deco Ring
18K Yellow Gold
18K White Gold
18K Rose Gold
Platinum
  • round
  • round
  • round
  • round

From $8,320.00 USD

Radiant E/W Diamond Cosma Ring
Radiant E/W Diamond Cosma Ring
Radiant E/W Diamond Cosma Ring
18K Yellow Gold
18K White Gold
18K Rose Gold
Platinum

From $5,800.00 USD

Radiant Diamond Cosma Ring
Radiant Diamond Cosma Ring
Radiant Diamond Cosma Ring
18K Yellow Gold
18K White Gold
18K Rose Gold
Platinum

From $5,880.00 USD

Cosma Oval Diamond Ring
Cosma Oval Diamond Ring
Cosma Oval Diamond Ring
18K Yellow Gold
18K White Gold
18K Rose Gold
Platinum
  • Oval
  • Oval
  • Oval
  • Oval

From $5,880.00 USD