Obsidian: complete guide

History and origin

It forms from the rapid cooling of silica-rich lavas and is found in several volcanic areas around the world. Since prehistoric times it has been used for blades and tools thanks to its sharp fracture, and later for mirrors and ornaments. In interior architecture it appears mainly in composite panels and small formats. Marmi di Carrara supplies it on request.

Look and veining

The colour is generally deep black, sometimes with golden or silvery sheen due to micro-inclusions, or with grey snowflake patches. It has no crystalline veining like common rocks, but it can show streaks or bands. Polished, it has an almost mirror-like effect, which is its main quality.

Technical properties (indicative)

Recommended uses

It is used in composite slabs or small formats for decorative walls, inlays, furniture tops and prestigious bathroom vanity tops. It is fragile under impact and chips with a conchoidal fracture, so it is not recommended for floors, kitchens or exteriors. Its cost also suggests targeted use.

Care and maintenance

Clean with a microfibre cloth and neutral detergent, as you would glass. Avoid impacts and abrasives, which scratch the polished surface. With composites, avoid solvents and sources of heat.

Pairings

• silver and polished steel
• uniform white marbles such as Thassos
• warm grazing light

FAQ