Precious Metal Touchstone 100×50×10 mm

touchstone is an essential tool for testing the purity of precious metals. Used together with testing acids, it provides a quick and reliable method for evaluating the purity of gold, silver and other precious metals.

The 100 × 50 × 10 mm size offers a generous working surface while remaining easy to handle, making it an excellent choice for both professional and regular use.

Ideal for

• Testing the purity of gold
• Identifying silver
• Evaluating jewellery and other precious metal items

Suitable for:

• Jewellers
• Watchmakers
• Pawn shops
• Precious metal buyers
• Jewellery stores
• Precious metal recycling and buying services

• Antique dealers

How to use

1. Draw a streak on the touchstone using the item to be tested.
2. Apply the appropriate testing acid to the streak.
3. Observe the reaction and compare the result with a reference sample.

The touchstone is designed for use with 8K, 14K, 18K, 21K and silver testing acids, available separately. After use, clean the touchstone with a suitable touchstone cleaning solution to maintain its surface and extend its service life.