[4 keys - 10k | 14 | 18k | silver]
ToolUSA Gold Testing Keys (TJ-99804). Comprising four keys, this set is designed to provide a reliable method for determining whether your gold is 10k, 14k, or 18k. An additional key is also provided for testing silver, allowing a comprehensive analysis of your precious metal items. To use these keys, youll perform a standard scratch test, a widely recognized method in the jewelry industry. By scratching the gold or silver piece against a testing stone and applying specific acids (not included), you can identify the karat of the gold. The resultant color reactions from the acids will indicate the purity of the gold or silver in question. However, its essential to note that while these testing keys are fundamental tools, the testing stone and the required special acids are not included in this set. Still, when combined, they provide a highly accurate way to measure the quality of precious metals.