One of a Kind
One-of-a-kind gemstone jewelry, shaped around a single stone.
Every piece on this page exists once. A stone is chosen for its individual color, clarity, and light. The setting is designed around it, forged and finished by hand, and never repeated. When a one-of-a-kind piece is acquired, it leaves the collection permanently.
Rings, necklaces, and earrings appear here from across kataoka's collections: tourmalines, aquamarines, sapphires, emeralds, Paraiba tourmalines, diamonds, moonstones, opals, and spinels in 18k beige gold and rose gold. Peter Ivy glass pieces complete the selection. Read the chronicle.
Floe Aquamarine Necklace
USD $5,000
Small Butterfly RingSunset
USD $9,000
Small Butterfly RingLagoon
USD $8,500
Small Butterfly RingAfterglow
USD $8,500
Small Butterfly RingBolina
USD $7,000
Blush Tourmaline Necklace
USD $4,000
Frostlight Aquamarine Necklace
USD $7,000
Snowflake RingParaiba
USD $35,000
Iceberg RingSerac
USD $14,800
Crown RingAquamarine & Beryl
USD $9,300
















