Testing for Silver
You will need the following tools:
- Black acid testing stone that is washed thoroughly with water prior to each test
- Acids
- Gold testing needles with gold tips - used for comparison with test pieces
Place a drop of acid on the object to be tested.
- 90-100% silver, the acid will show a creamy colour
- 77-90% silver, the acid turns a gray colour
- 65-75% silver, then the acid will show a light green colour.
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