THE COLLECTOR PRACTICE
One of a Kind
One stone. One jewel.
Every piece in One of a Kind begins with a single natural gemstone, chosen for its colour, its light and the small irregularities that make it unrepeatable: a Paraiba tourmaline with neon depth, a Colombian emerald with its own garden inside, a bicolor sapphire that shifts from one shade to the next, an alexandrite that changes with the light. The setting is then drawn for that stone alone.
Many of these rings are made to be worn as engagement rings. Each is made to order in 14K or 18K gold, typically in 3–5 weeks. When a jewel finds its owner, it moves to the Archive.
Looking for a permanent design instead? Explore Heirloom & Engagement Rings or read our bicolor sapphire engagement ring guide.
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One Of A Kind: Ceylon Blue Sapphire Imperial Diamond Ring in 14K and 18K Gold, 5.17ct
One Of A Kind: Ceylon Blue Sapphire Imperial Diamond Ring in 14K and 18K Gold, 5.17ct
- Regular price
- $20,000.00 USD - $20,500.00 USD
- Regular price
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- Sale price
- $20,000.00 USD - $20,500.00 USD
One Of A Kind: Ceylon Blue Sapphire Imperial Diamond Ring in 14K and 18K Gold, 5.17ct -
One Of A Kind: Grand Duchess Mint Colombian Emerald Ring, 5.12ct
One Of A Kind: Grand Duchess Mint Colombian Emerald Ring, 5.12ct
- Regular price
- $29,000.00 USD - $29,500.00 USD
- Regular price
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- Sale price
- $29,000.00 USD - $29,500.00 USD
One Of A Kind: Grand Duchess Mint Colombian Emerald Ring, 5.12ct -
One Of A Kind: Elysium Emerald Diamond Ring in 14K and 18K Gold, 5.69ct
One Of A Kind: Elysium Emerald Diamond Ring in 14K and 18K Gold, 5.69ct
- Regular price
- $16,500.00 USD - $16,900.00 USD
- Regular price
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- Sale price
- $16,500.00 USD - $16,900.00 USD
One Of A Kind: Elysium Emerald Diamond Ring in 14K and 18K Gold, 5.69ct -
One Of A Kind: Rosevine Butterfly Bi-Color Sapphire Diamond Ring in 14K and 18K Gold
One Of A Kind: Rosevine Butterfly Bi-Color Sapphire Diamond Ring in 14K and 18K Gold
- Regular price
- $6,500.00 USD - $7,000.00 USD
- Regular price
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- Sale price
- $6,500.00 USD - $7,000.00 USD
One Of A Kind: Rosevine Butterfly Bi-Color Sapphire Diamond Ring in 14K and 18K Gold -
One Of A Kind: Gilded Wave Aquamarine Diamond Ring in 14K and 18K Gold
One Of A Kind: Gilded Wave Aquamarine Diamond Ring in 14K and 18K Gold
- Regular price
- $3,880.00 USD - $4,280.00 USD
- Regular price
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- Sale price
- $3,880.00 USD - $4,280.00 USD
One Of A Kind: Gilded Wave Aquamarine Diamond Ring in 14K and 18K Gold -
One Of A Kind: Bi-Color Sapphire Golden Dawn Ring in 14K and 18K Gold
One Of A Kind: Bi-Color Sapphire Golden Dawn Ring in 14K and 18K Gold
- Regular price
- $2,700.00 USD - $3,200.00 USD
- Regular price
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- Sale price
- $2,700.00 USD - $3,200.00 USD
One Of A Kind: Bi-Color Sapphire Golden Dawn Ring in 14K and 18K Gold -
One Of A Kind: Paraiba Tourmaline Dreamweaver Diamond Ring in 14K and 18K Gold
One Of A Kind: Paraiba Tourmaline Dreamweaver Diamond Ring in 14K and 18K Gold
- Regular price
- $3,500.00 USD - $4,000.00 USD
- Regular price
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- Sale price
- $3,500.00 USD - $4,000.00 USD
One Of A Kind: Paraiba Tourmaline Dreamweaver Diamond Ring in 14K and 18K Gold -
One Of A Kind: Salt & Pepper Diamond Aurora Crown Ring in 14K and 18K Gold
One Of A Kind: Salt & Pepper Diamond Aurora Crown Ring in 14K and 18K Gold
- Regular price
- $3,400.00 USD - $3,800.00 USD
- Regular price
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- Sale price
- $3,400.00 USD - $3,800.00 USD
One Of A Kind: Salt & Pepper Diamond Aurora Crown Ring in 14K and 18K Gold -
One Of A Kind: Purple Sapphire Mystique Diamond Ring in 14K and 18K Gold
One Of A Kind: Purple Sapphire Mystique Diamond Ring in 14K and 18K Gold
- Regular price
- $3,750.00 USD - $4,250.00 USD
- Regular price
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- Sale price
- $3,750.00 USD - $4,250.00 USD
One Of A Kind: Purple Sapphire Mystique Diamond Ring in 14K and 18K Gold -
One Of A Kind: Stormy Sky Rubellite Tourmaline Diamond Ring in 14K and 18K Gold
One Of A Kind: Stormy Sky Rubellite Tourmaline Diamond Ring in 14K and 18K Gold
- Regular price
- $6,200.00 USD - $6,500.00 USD
- Regular price
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- Sale price
- $6,200.00 USD - $6,500.00 USD
One Of A Kind: Stormy Sky Rubellite Tourmaline Diamond Ring in 14K and 18K Gold -
One Of A Kind: Watermelon Tourmaline Melody Necklace in 14K and 18K Gold
One Of A Kind: Watermelon Tourmaline Melody Necklace in 14K and 18K Gold
- Regular price
- $1,200.00 USD - $1,700.00 USD
- Regular price
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- Sale price
- $1,200.00 USD - $1,700.00 USD
One Of A Kind: Watermelon Tourmaline Melody Necklace in 14K and 18K Gold -
One Of A Kind: Stormy Sky Bi-Color Sapphire Diamond Ring in 14K and 18K Gold
One Of A Kind: Stormy Sky Bi-Color Sapphire Diamond Ring in 14K and 18K Gold
- Regular price
- $3,800.00 USD - $4,300.00 USD
- Regular price
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- Sale price
- $3,800.00 USD - $4,300.00 USD
One Of A Kind: Stormy Sky Bi-Color Sapphire Diamond Ring in 14K and 18K Gold -
One Of A Kind: Watermelon Tourmaline Mademoiselle Necklace in 14K Gold
One Of A Kind: Watermelon Tourmaline Mademoiselle Necklace in 14K Gold
- Regular price
- $1,400.00 USD
- Regular price
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- Sale price
- $1,400.00 USD
One Of A Kind: Watermelon Tourmaline Mademoiselle Necklace in 14K Gold -
One Of A Kind: Bi Color Sapphire Golden Horizon Ring in 14K and 18K Gold
One Of A Kind: Bi Color Sapphire Golden Horizon Ring in 14K and 18K Gold
- Regular price
- $2,950.00 USD - $3,450.00 USD
- Regular price
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- Sale price
- $2,950.00 USD - $3,450.00 USD
One Of A Kind: Bi Color Sapphire Golden Horizon Ring in 14K and 18K Gold -
One Of A Kind: Bi-Color Blue Sapphire Skybound Diamond Ring in 14K and 18K Gold
One Of A Kind: Bi-Color Blue Sapphire Skybound Diamond Ring in 14K and 18K Gold
- Regular price
- $3,200.00 USD - $3,700.00 USD
- Regular price
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- Sale price
- $3,200.00 USD - $3,700.00 USD
One Of A Kind: Bi-Color Blue Sapphire Skybound Diamond Ring in 14K and 18K Gold -
One Of A Kind: Green Tourmaline Verdant Crown Diamond Ring in 14K and 18K Gold
One Of A Kind: Green Tourmaline Verdant Crown Diamond Ring in 14K and 18K Gold
- Regular price
- $2,800.00 USD - $3,300.00 USD
- Regular price
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- Sale price
- $2,800.00 USD - $3,300.00 USD
One Of A Kind: Green Tourmaline Verdant Crown Diamond Ring in 14K and 18K Gold -
One Of A Kind: Aurora Blossom Bi Color Sapphire Diamond Ring in 14K and 18K Gold
One Of A Kind: Aurora Blossom Bi Color Sapphire Diamond Ring in 14K and 18K Gold
- Regular price
- $2,200.00 USD - $2,700.00 USD
- Regular price
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- Sale price
- $2,200.00 USD - $2,700.00 USD
One Of A Kind: Aurora Blossom Bi Color Sapphire Diamond Ring in 14K and 18K Gold -
One Of A Kind: Bi-Color Blue Sapphire Moon Diamond Ring in 14K and 18K Gold
One Of A Kind: Bi-Color Blue Sapphire Moon Diamond Ring in 14K and 18K Gold
- Regular price
- $2,550.00 USD - $3,050.00 USD
- Regular price
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- Sale price
- $2,550.00 USD - $3,050.00 USD
One Of A Kind: Bi-Color Blue Sapphire Moon Diamond Ring in 14K and 18K Gold -
One Of A Kind: City of Lights Opal, Alexandrite, Emerald and Ruby Ring in 14K and 18K Gold
One Of A Kind: City of Lights Opal, Alexandrite, Emerald and Ruby Ring in 14K and 18K Gold
- Regular price
- $3,000.00 USD - $3,500.00 USD
- Regular price
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- Sale price
- $3,000.00 USD - $3,500.00 USD
One Of A Kind: City of Lights Opal, Alexandrite, Emerald and Ruby Ring in 14K and 18K Gold -
One Of A Kind: Champagne Diamond Sunflower Ring in 14K and 18K Gold
One Of A Kind: Champagne Diamond Sunflower Ring in 14K and 18K Gold
- Regular price
- $2,800.00 USD
- Regular price
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- Sale price
- $2,800.00 USD
One Of A Kind: Champagne Diamond Sunflower Ring in 14K and 18K Gold -
One Of A Kind: Secret Garden Alexandrite Diamond Ring in 14K and 18K Gold
One Of A Kind: Secret Garden Alexandrite Diamond Ring in 14K and 18K Gold
- Regular price
- $7,500.00 USD - $7,800.00 USD
- Regular price
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- Sale price
- $7,500.00 USD - $7,800.00 USD
One Of A Kind: Secret Garden Alexandrite Diamond Ring in 14K and 18K Gold -
One Of A Kind: Trillion Tanzanite Nature Diamond Ring in 14K and 18K Gold
One Of A Kind: Trillion Tanzanite Nature Diamond Ring in 14K and 18K Gold
- Regular price
- $2,500.00 USD - $3,000.00 USD
- Regular price
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- Sale price
- $2,500.00 USD - $3,000.00 USD
One Of A Kind: Trillion Tanzanite Nature Diamond Ring in 14K and 18K Gold -
One Of A Kind: Pear Alexandrite Heart Rosy Diamond Ring in 14K and 18K Gold, 1.19ct
One Of A Kind: Pear Alexandrite Heart Rosy Diamond Ring in 14K and 18K Gold, 1.19ct
- Regular price
- $13,200.00 USD - $13,500.00 USD
- Regular price
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- Sale price
- $13,200.00 USD - $13,500.00 USD
One Of A Kind: Pear Alexandrite Heart Rosy Diamond Ring in 14K and 18K Gold, 1.19ct -
One Of A Kind: Arabesque Pink Tourmaline Diamond Ring in 14K and 18K Gold
One Of A Kind: Arabesque Pink Tourmaline Diamond Ring in 14K and 18K Gold
- Regular price
- $2,500.00 USD - $2,900.00 USD
- Regular price
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- Sale price
- $2,500.00 USD - $2,900.00 USD
One Of A Kind: Arabesque Pink Tourmaline Diamond Ring in 14K and 18K Gold -
One Of A Kind: Bi Color Sapphire Shield Paradise Ring in 14K and 18K Gold
One Of A Kind: Bi Color Sapphire Shield Paradise Ring in 14K and 18K Gold
- Regular price
- $5,500.00 USD - $5,900.00 USD
- Regular price
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- Sale price
- $5,500.00 USD - $5,900.00 USD
One Of A Kind: Bi Color Sapphire Shield Paradise Ring in 14K and 18K Gold -
One Of A Kind: Metallic Black Spinel Cobra Diamond Ring in 14K and 18K Gold
One Of A Kind: Metallic Black Spinel Cobra Diamond Ring in 14K and 18K Gold
- Regular price
- $9,500.00 USD - $9,900.00 USD
- Regular price
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- Sale price
- $9,500.00 USD - $9,900.00 USD
One Of A Kind: Metallic Black Spinel Cobra Diamond Ring in 14K and 18K Gold -
One Of A Kind: Alhambra Glow Rubellite Cushion Ring in 14K and 18K Gold
One Of A Kind: Alhambra Glow Rubellite Cushion Ring in 14K and 18K Gold
- Regular price
- $3,500.00 USD - $3,900.00 USD
- Regular price
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- Sale price
- $3,500.00 USD - $3,900.00 USD
One Of A Kind: Alhambra Glow Rubellite Cushion Ring in 14K and 18K Gold -
One Of A Kind: Champagne Diamond Ballerina Ring in 14K and 18K Gold, 2.03ct
One Of A Kind: Champagne Diamond Ballerina Ring in 14K and 18K Gold, 2.03ct
- Regular price
- $13,500.00 USD - $13,800.00 USD
- Regular price
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- Sale price
- $13,500.00 USD - $13,800.00 USD
One Of A Kind: Champagne Diamond Ballerina Ring in 14K and 18K Gold, 2.03ct








