Obsidian Tumblestones (Rainbow)


Tumbled Rainbow Obsidian pieces.

In stock

Rainbow Obsidian Tumblestones

Lovely rainbow Obsidian tumblestones measuring around 20-30MM long each.

These Obsidian pieces are named for colourful bands or markings on their surface. The highest grade pieces can have a rainbow of colours in; these pieces are not typically tumbled, though!

For the best effect, we’d recommend looking at these under a bright light.

Small inclusions under the surface cause the interesting colours in this volcanic glass. In the areas where there are no inclusions, these pieces are typically black.


Because of the optical effect on the surface of these stones, we find people typically like to handle them. I’d perhaps recommend storing them in a bowl or similar – not a fishtank, or something inaccessible.

The pictures you see here are representative of the products and are usually not the exact item you will receive. Where various grades are available we do try to photograph each grade – but some photographs are still on their way!


For more information about Rainbow Obsidian, and a full list of all of our related products, we suggest looking at our ‘Rainbow Obsidian’ page.


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What are tumblestones?

Tumblestones are stones that have been put in spinning barrels with an abrasive compound for weeks or months. This slowly rounds off the rough rock and corners – the stones are then cleaned, and placed with a less abrasive grit. This happens several times until the stones are placed into a barrel with a polishing compound for their final polish.