Obsidian Tumblestones (Black)

Pieces of tumbled Black Obsidian, available in a few sizes.


Bulk buys – discounts applied at cart/checkout.

Buy 5 or more: 5% off ● Buy 10 or more: 10% off ● Buy 20 or more: 20% off

Black Obsidian Tumblestones

Black Obsidian tumblestones, available in a few sizes. Obsidian is a dark brown-black volcanic glass, naturally occurring.

Some of these stones will be slightly brown, rather than a deep black. Some pieces may also have a silver sheen in, which is truly beautiful when viewed in light.


These beautiful stones make a great decorative object in a bowl or a small vase. As a glass, they are perfectly suitable for use as fish tank or aquarium gravel. They do not contain any metals or anything that would affect a delicate pH balance.

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!

Additional information

Weight 0.02 kg
Dimensions 3 × 3 × 2 cm

Small – 10-20MM, 5pcs, Medium – 20-30MM, 1pc, Large – 30-40MM, 1pc


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