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: Midnight Stillness Bi-Color Sapphire Diamond Ring in 14K and 18K Gold
One Of A Kind: Midnight Stillness Bi-Color Sapphire Diamond Ring in 14K and 18K Gold
- Precio regular
- $5,800.00 USD - $6,200.00 USD
- Precio regular
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- Precio de venta
- $5,800.00 USD - $6,200.00 USD
One Of A Kind: Midnight Stillness Bi-Color Sapphire Diamond Ring in 14K and 18K Gold -
One Of A Kind: After The Storm Bi-Color Sapphire Diamond Ring in 14K and 18K Gold
One Of A Kind: After The Storm Bi-Color Sapphire Diamond Ring in 14K and 18K Gold
- Precio regular
- $9,200.00 USD - $9,700.00 USD
- Precio regular
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- Precio de venta
- $9,200.00 USD - $9,700.00 USD
One Of A Kind: After The Storm Bi-Color Sapphire Diamond Ring in 14K and 18K Gold -
One Of A Kind: Brush Stroke Of Dusk Sapphire Diamond Ring in 14K and 18K Gold
One Of A Kind: Brush Stroke Of Dusk Sapphire Diamond Ring in 14K and 18K Gold
- Precio regular
- $4,300.00 USD - $4,700.00 USD
- Precio regular
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- Precio de venta
- $4,300.00 USD - $4,700.00 USD
One Of A Kind: Brush Stroke Of Dusk Sapphire Diamond Ring in 14K and 18K Gold -
One Of A Kind: Bicolor Sapphire Gilded Grove Diamond Ring in 14K and 18K Gold
One Of A Kind: Bicolor Sapphire Gilded Grove Diamond Ring in 14K and 18K Gold
- Precio regular
- $4,400.00 USD - $4,800.00 USD
- Precio regular
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- Precio de venta
- $4,400.00 USD - $4,800.00 USD
One Of A Kind: Bicolor Sapphire Gilded Grove Diamond Ring in 14K and 18K Gold -
One Of A Kind: Alexandrite Crown of Two Lights Ring in 14K & 18K Gold, 1.19ct
One Of A Kind: Alexandrite Crown of Two Lights Ring in 14K & 18K Gold, 1.19ct
- Precio regular
- $15,000.00 USD - $15,400.00 USD
- Precio regular
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- Precio de venta
- $15,000.00 USD - $15,400.00 USD
One Of A Kind: Alexandrite Crown of Two Lights Ring in 14K & 18K Gold, 1.19ct -
One Of A Kind: Paraiba Tourmaline Sovereign Diamond Ring in 14K and 18K Gold
One Of A Kind: Paraiba Tourmaline Sovereign Diamond Ring in 14K and 18K Gold
- Precio regular
- $35,000.00 USD - $35,500.00 USD
- Precio regular
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- Precio de venta
- $35,000.00 USD - $35,500.00 USD
One Of A Kind: Paraiba Tourmaline Sovereign Diamond Ring in 14K and 18K Gold -
One Of A Kind: Ruby Belladonna Diamond Ring in 14K and 18K Gold
One Of A Kind: Ruby Belladonna Diamond Ring in 14K and 18K Gold
- Precio regular
- $4,700.00 USD - $5,000.00 USD
- Precio regular
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- Precio de venta
- $4,700.00 USD - $5,000.00 USD
One Of A Kind: Ruby Belladonna Diamond Ring in 14K and 18K Gold -
One Of A Kind: Red Spinel Emberveil Diamond Ring in 14K and 18K Gold
One Of A Kind: Red Spinel Emberveil Diamond Ring in 14K and 18K Gold
- Precio regular
- $3,200.00 USD - $3,600.00 USD
- Precio regular
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- Precio de venta
- $3,200.00 USD - $3,600.00 USD
One Of A Kind: Red Spinel Emberveil Diamond Ring in 14K and 18K Gold -
One Of A Kind: Maison du Soir Ring in 14K and 18K Gold
One Of A Kind: Maison du Soir Ring in 14K and 18K Gold
- Precio regular
- $2,700.00 USD - $3,000.00 USD
- Precio regular
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- Precio de venta
- $2,700.00 USD - $3,000.00 USD
One Of A Kind: Maison du Soir Ring in 14K and 18K Gold -
One Of A Kind: Mermaid Tanzanite Diamond Ring in 14K and 18K Gold
One Of A Kind: Mermaid Tanzanite Diamond Ring in 14K and 18K Gold
- Precio regular
- $3,000.00 USD - $3,400.00 USD
- Precio regular
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- Precio de venta
- $3,000.00 USD - $3,400.00 USD
One Of A Kind: Mermaid Tanzanite Diamond Ring in 14K and 18K Gold -
One Of A Kind: Cathedral Of Light Moonstone Diamond Ring in 14K and 18K Gold
One Of A Kind: Cathedral Of Light Moonstone Diamond Ring in 14K and 18K Gold
- Precio regular
- $4,500.00 USD - $5,000.00 USD
- Precio regular
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- Precio de venta
- $4,500.00 USD - $5,000.00 USD
One Of A Kind: Cathedral Of Light Moonstone Diamond Ring in 14K and 18K Gold -
One Of A Kind: Blue Spinel Miraj Diamond Ring in 14K and 18K Gold
One Of A Kind: Blue Spinel Miraj Diamond Ring in 14K and 18K Gold
- Precio regular
- $3,500.00 USD - $3,900.00 USD
- Precio regular
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- Precio de venta
- $3,500.00 USD - $3,900.00 USD
One Of A Kind: Blue Spinel Miraj Diamond Ring in 14K and 18K Gold -
One Of A Kind: Starry Muse Alexandrite Diamond Ring in 14K and 18K Gold
One Of A Kind: Starry Muse Alexandrite Diamond Ring in 14K and 18K Gold
- Precio regular
- $6,000.00 USD - $6,500.00 USD
- Precio regular
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- Precio de venta
- $6,000.00 USD - $6,500.00 USD
One Of A Kind: Starry Muse Alexandrite Diamond Ring in 14K and 18K Gold -
Salt & Pepper Diamond Vita Noire Diamond Ring in 14K and 18K Gold
Salt & Pepper Diamond Vita Noire Diamond Ring in 14K and 18K Gold
- Precio regular
- $5,600.00 USD - $5,900.00 USD
- Precio regular
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- Precio de venta
- $5,600.00 USD - $5,900.00 USD
Salt & Pepper Diamond Vita Noire Diamond Ring in 14K and 18K Gold -
One of a Kind: Queens Prayer Ruby and Alexandrite Ring in 14K and 18K Gold
One of a Kind: Queens Prayer Ruby and Alexandrite Ring in 14K and 18K Gold
- Precio regular
- $8,800.00 USD - $9,100.00 USD
- Precio regular
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- Precio de venta
- $8,800.00 USD - $9,100.00 USD
One of a Kind: Queens Prayer Ruby and Alexandrite Ring in 14K and 18K Gold -
One Of A Kind: Bicolor Tourmaline Veil Diamond Ring in 14K and 18K Gold
One Of A Kind: Bicolor Tourmaline Veil Diamond Ring in 14K and 18K Gold
- Precio regular
- $3,300.00 USD - $3,700.00 USD
- Precio regular
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- Precio de venta
- $3,300.00 USD - $3,700.00 USD
One Of A Kind: Bicolor Tourmaline Veil Diamond Ring in 14K and 18K Gold -
One Of A Kind: Internal Flawless Diamond Lumina Ring in 14K and 18K Gold, 1ct
One Of A Kind: Internal Flawless Diamond Lumina Ring in 14K and 18K Gold, 1ct
- Precio regular
- $19,000.00 USD - $20,000.00 USD
- Precio regular
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- Precio de venta
- $19,000.00 USD - $20,000.00 USD
One Of A Kind: Internal Flawless Diamond Lumina Ring in 14K and 18K Gold, 1ct -
One Of A Kind: Galaxienne Salt & Pepper Diamond Ring in 14K and 18K Gold
One Of A Kind: Galaxienne Salt & Pepper Diamond Ring in 14K and 18K Gold
- Precio regular
- $5,300.00 USD - $5,700.00 USD
- Precio regular
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- Precio de venta
- $5,300.00 USD - $5,700.00 USD
One Of A Kind: Galaxienne Salt & Pepper Diamond Ring in 14K and 18K Gold -
One Of A Kind: Teal Sapphire Marrow Diamond Ring in 14K and 18K Gold
One Of A Kind: Teal Sapphire Marrow Diamond Ring in 14K and 18K Gold
- Precio regular
- $2,500.00 USD - $2,900.00 USD
- Precio regular
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- Precio de venta
- $2,500.00 USD - $2,900.00 USD
One Of A Kind: Teal Sapphire Marrow Diamond Ring in 14K and 18K Gold -
One Of A Kind: Alexandrite & Paraiba Tourmaline Waking Dream Ring in 14K and 18K Gold
One Of A Kind: Alexandrite & Paraiba Tourmaline Waking Dream Ring in 14K and 18K Gold
- Precio regular
- $8,500.00 USD - $8,800.00 USD
- Precio regular
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- Precio de venta
- $8,500.00 USD - $8,800.00 USD
One Of A Kind: Alexandrite & Paraiba Tourmaline Waking Dream Ring in 14K and 18K Gold -
One Of A Kind: Stormheart Salt & Pepper Heart Diamond Ring in 14K and 18K Gold
One Of A Kind: Stormheart Salt & Pepper Heart Diamond Ring in 14K and 18K Gold
- Precio regular
- $4,800.00 USD - $5,200.00 USD
- Precio regular
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- Precio de venta
- $4,800.00 USD - $5,200.00 USD
One Of A Kind: Stormheart Salt & Pepper Heart Diamond Ring in 14K and 18K Gold -
One Of A Kind: Solara & Mare Ring Diamond Ring in 14K and 18K Gold
One Of A Kind: Solara & Mare Ring Diamond Ring in 14K and 18K Gold
- Precio regular
- $2,500.00 USD - $3,000.00 USD
- Precio regular
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- Precio de venta
- $2,500.00 USD - $3,000.00 USD
One Of A Kind: Solara & Mare Ring Diamond Ring in 14K and 18K Gold -
One Of A Kind: Amaranthe Garnet Studs in 14K and 18K Gold
One Of A Kind: Amaranthe Garnet Studs in 14K and 18K Gold
- Precio regular
- $2,500.00 USD - $3,000.00 USD
- Precio regular
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- Precio de venta
- $2,500.00 USD - $3,000.00 USD
One Of A Kind: Amaranthe Garnet Studs in 14K and 18K Gold -
One Of A Kind: Spinel & Paraiba Tourmaline Rosarium Diamond Ring in 14K and 18K Gold
One Of A Kind: Spinel & Paraiba Tourmaline Rosarium Diamond Ring in 14K and 18K Gold
- Precio regular
- $4,500.00 USD - $5,000.00 USD
- Precio regular
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- Precio de venta
- $4,500.00 USD - $5,000.00 USD
One Of A Kind: Spinel & Paraiba Tourmaline Rosarium Diamond Ring in 14K and 18K Gold -
One Of A Kind: Bicolor Tourmaline Nightveil Earrings in 14K and 18K Gold
One Of A Kind: Bicolor Tourmaline Nightveil Earrings in 14K and 18K Gold
- Precio regular
- $4,400.00 USD - $4,700.00 USD
- Precio regular
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- Precio de venta
- $4,400.00 USD - $4,700.00 USD
One Of A Kind: Bicolor Tourmaline Nightveil Earrings in 14K and 18K Gold -
One Of A Kind: Rubellite Crimson Oath Diamond Ring in 14K and 18K Gold, 5.5ct
One Of A Kind: Rubellite Crimson Oath Diamond Ring in 14K and 18K Gold, 5.5ct
- Precio regular
- $4,500.00 USD - $4,800.00 USD
- Precio regular
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- Precio de venta
- $4,500.00 USD - $4,800.00 USD
One Of A Kind: Rubellite Crimson Oath Diamond Ring in 14K and 18K Gold, 5.5ct -
One Of A Kind: Florienne Bi-Color Tourmaline Drops in 14K and 18K Gold
One Of A Kind: Florienne Bi-Color Tourmaline Drops in 14K and 18K Gold
- Precio regular
- $2,300.00 USD - $2,600.00 USD
- Precio regular
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- Precio de venta
- $2,300.00 USD - $2,600.00 USD
One Of A Kind: Florienne Bi-Color Tourmaline Drops in 14K and 18K Gold -
One Of A Kind: Viola Bicolor Tourmaline Pendant in 14K and 18K Gold
One Of A Kind: Viola Bicolor Tourmaline Pendant in 14K and 18K Gold
- Precio regular
- $1,400.00 USD - $1,900.00 USD
- Precio regular
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- Precio de venta
- $1,400.00 USD - $1,900.00 USD
One Of A Kind: Viola Bicolor Tourmaline Pendant in 14K and 18K Gold -
One Of A Kind: Bicolor Tourmaline Diana Ring in 14K and 18K Gold
One Of A Kind: Bicolor Tourmaline Diana Ring in 14K and 18K Gold
- Precio regular
- $2,500.00 USD - $3,000.00 USD
- Precio regular
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- Precio de venta
- $2,500.00 USD - $3,000.00 USD
One Of A Kind: Bicolor Tourmaline Diana Ring in 14K and 18K Gold -
One Of A Kind: Frostbloom Salt & Pepper Diamond Ring in 14K and 18K Gold
One Of A Kind: Frostbloom Salt & Pepper Diamond Ring in 14K and 18K Gold
- Precio regular
- $5,200.00 USD - $5,500.00 USD
- Precio regular
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- Precio de venta
- $5,200.00 USD - $5,500.00 USD
One Of A Kind: Frostbloom Salt & Pepper Diamond Ring in 14K and 18K Gold -
One Of A Kind: Tanzanite Trillion Vespera Diamond Ring in 14K and 18K Gold
One Of A Kind: Tanzanite Trillion Vespera Diamond Ring in 14K and 18K Gold
- Precio regular
- $4,800.00 USD - $5,200.00 USD
- Precio regular
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- Precio de venta
- $4,800.00 USD - $5,200.00 USD
One Of A Kind: Tanzanite Trillion Vespera Diamond Ring in 14K and 18K Gold -
One Of A Kind: Shadowlace Studs in 14K and 18K Gold
One Of A Kind: Shadowlace Studs in 14K and 18K Gold
- Precio regular
- $2,200.00 USD - $2,500.00 USD
- Precio regular
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- Precio de venta
- $2,200.00 USD - $2,500.00 USD
One Of A Kind: Shadowlace Studs in 14K and 18K Gold








