Gold Testing Stone
- A traditional method of testing the purity of precious metals, in particular gold
- Confirm karat markings and purity of gold by gently scrape jewellery item along the stone
- Use with an appropriate gold testing acid and apply directly to the stone
- Â Can also be used with test needles to confirm karat markings
- Also works with silver and platinum when correct acid solutions are used
- Stone measures 62 x 38 x 12mm