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Portable & Convenient: Compact bottles and test stone are easy to carry in a bag, purse, or briefcase. JSP 9K Gold Testing Acid Solution (0.5 oz). JSP 10K Gold Testing Acid Solution (0.5 oz). Apply a drop of the appropriate testing acid to the stone.
When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.