New large size gold and silver testing stone. Precious metal acid testing stone should serve you for hundreds of chemical tests. Purchase this glass gold testing stones when you need a new high quality surface for your testing chemicals. Used when using test acids for gold jewelry and watches. Includes a non slipping pad on the bottom of the stone so the testing stone will not slip across your desk.
- Product size 6" X 3" Inches (152 X 76mm)
- Thickness 0.3" inches
To clean stone; use 2-3 drops of 22k acid and rinse with water dampened cloth