Natural Obsidian Test Stone

$18.95

Item #: 7494
Transline#: gt35
Size: 5x2x1/2 Color: Black
Sold Individually
Case Qty: 13

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.

Weight 1 oz
Dimensions 5 × 2 × 0.5 cm