Information about Rainbow Obsidian

Rainbow obsidian is a volcanic glass known for its iridescent, multi-coloured sheen that displays a spectrum of colours when viewed from different angles.

The primary colours seen are green, blue, purple, gold, and red, often appearing in bands or streaks, which gives it its characteristic “rainbow” effect.

This striking visual is the result of internal gas bubbles or mineral inclusions within the obsidian, which create an optical phenomenon known as iridescence.

Uses and History

Rainbow obsidian is primarily used in the creation of jewellery, usually cut as cabochons. It is also used for various carved decorative items due to its beautiful, captivating appearance.

It is polished into beads, and sometimes set into pendants, rings, and bracelets for those seeking unique accessories with a touch of natural beauty. The iridescence of rainbow obsidian makes it highly prized by lapidaries and gem collectors.

Obsidian has been used by humans for thousands of years, with evidence of its use dating back to prehistoric times.

Ancient Mesoamerican cultures, like the Aztecs and Mayans, valued it for its sharpness and used it to make blades, mirrors, and ritual objects.

Mineralogy

Hazards and Warnings

Obsidian of all forms can be extremely sharp when broken or cut.

Mineral collectors should wash their hands after handling specimens, to avoid any exposure to potential toxins.

Almost all rocks, minerals (and, frankly, almost all other substances on earth) can produce toxic dust when cutting, which can cause serious respiratory conditions including silicosis.

When cutting or polishing rocks, minerals, shells, etc, all work should be done wet to minimise the dust, and a suitable respirator or extraction system should be used.

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