JSP Gold Testing Stone
JSP Jet Black Gold Testing Stone Natural Obsidian
- Genuine and natural obsidian
- Jet black, for the highest contrast
- Smooth surface is the best way to test gold
- convenient 5" x 2" surface size
This stone is used in conjunction with Gold test acids to determine if solid gold and karats. Test stones are used to test your gold jewelry without ruining it, by using the stone to test instead of directly on the piece.