Red Agate — warm crimson, banded with quiet character.
A grounded, warm-toned stone with naturally drawn banding. Confident in colour, restrained in feel.
Why this material
- Rich red tones with natural banding — no two seals identical.
- Long held as a stone of strength, vitality, and protection.
- 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 fitting seal for personal milestones — an opening, an anniversary, or a piece begun for one name and intended for the next.
Red Agate
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.

















