Natural Obsidian Test Stone

$85.00

Item #: 7497
Transline#: gt38
Size: 8x2x3/4 Color: black
Sold Individually
Case Qty: 1

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 8 × 2 × 0.75 cm