£1.49

Obsidian, Black Tumblestone
(Cat No. CTUM-0006)

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Black Obsidian Tumblestone
*Size:*	35mm (average)
*Weight:*	30g (maximum)
*Notes:*	These are sold individually. The items pictured are an example from our stock, you might not be sent one that is pictured.

Description:

Black Obsidian Tumblestone.

Obsidian consists of silicon dioxide (Silica) that forms rock. Obsidian is not crystalline and therefore not a mineral. Obsidian forms from volcanic lava that has cooled to quickly for crystals to form. Obsidian is termed a natural volcanic glass and iron and magnesium impurities produce a black or dark green Obsidian. The presence of microscopic bubble patterns cause Obsidian to colour sheen.


	(Video: Black Obsidian Tumblestone)
*Video:*

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This product was last updated in our catalog on Monday 21 January, 2013.

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