Ruby in the Night — deep red crystal set in dark stone.
A rare composite of ruby crystal in matrix — quiet from across the room, breathtaking in the hand. A seal for those who prefer their statements understated.
Why this material
- Vivid ruby crystal embedded in deep, dark host stone — each piece unrepeatable.
- Long held as a symbol of vitality, passion, and conviction.
- Hard, dense, and built to hold a crisp impression for generations.
A Case as Crafted as the Seal Within.
Made exclusively for us from genuine kimono fabric, each case is patterned with a traditional Japanese motif — animals, flowers, flowing water — a small work of art that honours the seal it holds.
Who it’s for
A striking seal for personal milestones — an anniversary, a succession, a piece begun for one name and intended for the next.
Ruby in the Night
KAMAKURA SIGNET — The Precious Stone Collection
precision-engraved in our Kamakura atelier — a workshop that has practised the art of the seal since 1898, through four generations of the Tsukino family. Each seal is precision-engraved by masters holding Japan’s First-Class National Certification in seal engraving — a distinction shared by fewer than one hundred artisans in the country — in the Tsukino Kissotai script that exists in no other workshop. Among the rarest materials we offer in a personal seal.
A one-of-a-kind work, carved once for a single name. Not a stamp to be used and discarded — an object to be owned, and passed on.

















