Postalco Mineral Key Holder Tokachi

The Postalco Mineral Key Holder Tokachi combines solid brass with genuine Tokachi obsidian – a natural stone from Japan, hand-cut and finished by traditional stonemasons. Keys hang in an orderly line on a brass rod rather than bunched together, which makes a tangible difference in everyday use. The cool, smooth feel of the stone alternates with the warm weight of the brass – a interplay of two materials that both grow more beautiful with time.

Features

• Linear key setup: Keys hang in an orderly row on a brass rod – no rattling, no tangling, instant overview without looking.
• Quick access by position: Place your most-used key on the outer position – feelable by touch alone, no need to search through the entire keyring.
• Genuine Tokachi obsidian: Uncoloured, untreated. Each stone displays individual colour and pattern variations – no two pieces are identical.
• Handcrafted in Japan: The stone is hand-cut and finished by traditional stonemasons; shapes and surfaces naturally vary slightly.
• Solid brass body with screw closure: Robust, durable hardware – the screw closure keeps keys securely on the rod and can be opened to change the arrangement.
• Living patina: Brass darkens over time and becomes polished to a shine on frequently touched areas through friction – the accessory visibly transforms with use.

Use & Tips

• Hang your most-used key (house door, office) on an outer position – you can then grab it without searching.
• Tighten the screw closure by hand after hanging your keys, but don't overtighten – check occasionally as it may loosen slightly through movement.
• Wipe the stone with a slightly damp cloth and dry immediately – no soaking, no scrubbing.
• Avoid hard impacts: obsidian is volcanic glass and can splinter if struck hard against a hard surface. Discontinue use if sharp edges develop from damage.
• If you prefer brass in its natural state, simply let the patina develop; if you want to retain the original shine, occasionally wipe the brass parts with a dry cloth.

For Materials Enthusiasts

Tokachi is a region in Hokkaido, known for its obsidian – a volcanic glass formed by the rapid cooling of lava. The material has a natural, subtly translucent depth that distinguishes it clearly from opaque stones. Obsidian is hard but brittle: the fracture edges are razor-sharp (hence the caution about impacts), and this is precisely what has made the stone valuable as a tool material for thousands of years. Combined with brass – a material created through a living alloy of copper and zinc that constantly changes through oxidation and use – the result is a key holder whose character builds up over years rather than wearing away.

Technical Specifications