Coin Tools: Natural Obsidian Test Stone 8 x 2 x 3/4

Model	Size	Color	Pack Qty
gt38	8x2x3/4	black	1

Description

Natural Obsidian Test Stone 8 x 2 x 3/4

Natural obsidian test stones give precise readings when testing for gold purity. Obsidian is a volcanic glass produced when lava becomes cold. It is been used for years to make the sharpest knives. Obsidian test stones, on the contrary to rougher test stones, have a perfectly smooth surface that provides more consistent and reliable readings. 8 x 2 x 3/4

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Natural Obsidian Test Stone 8 x 2 x 3/4

Description

Natural Obsidian Test Stone 8 x 2 x 3/4

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