Fast, Accurate, and Trusted for Over 40 Years – Ideal for Jewelers, Appraisers & Collectors
Ensure your gold is the real deal with JSP’s 18K Gold Testing Solution. Manufactured in the USA and widely trusted since 1980, this professional-grade acid provides reliable and precise results when identifying 18K gold purity. Whether you're verifying estate pieces or checking new inventory, JSP delivers peace of mind with every test.
✅ Fresh & Factory-Sealed: We ship directly from JSP with sealed freshness – no expired or diluted stock.
✅ Fast & Reliable Testing: Confirms gold purity of 18 karat with consistent, accurate results.
✅ High-Yield Formula: Each 0.5 oz bottle provides up to 400 individual tests.
✅ Portable & Practical: Travel-ready size fits in your pocket or jewelry case – perfect for in-store or on-the-go evaluations.
✅ Industry-Leading Brand: JSP is the #1 trusted name in precious metal testing solutions for jewelers, collectors, and resellers.
Lightly scratch your gold item on a test stone (not included).
Apply one drop of JSP 18K acid directly on the scratch.
Watch for the reaction:
Mark remains = Item is at least 18K gold
Mark fades = Item is less than 18K
(1) 0.5 oz Bottle of JSP 18K Gold Testing Solution
(1) Printed Instruction Booklet with reaction chart
For professional and adult use only.
Always wear gloves and eye protection during use.
Store in a cool, dry place away from children and pets.
Test stone sold separately.
💡 Ideal for:
Jewelry Appraisal • Coin Testing • Pawn Shops • Estate Buyers • Scrap Gold Dealers • Hobbyists • eBay Sellers
You may return most new, unopened items within 30 days of delivery for a full refund. We'll also pay the return shipping costs if the return is a result of our error (you received an incorrect or defective item, etc.).
You should expect to receive your refund within four weeks of giving your package to the return shipper, however, in many cases you will receive a refund more quickly. This time period includes the transit time for us to receive your return from the shipper (5 to 10 business days), the time it takes us to process your return once we receive it (3 to 5 business days), and the time it takes your bank to process our refund request (5 to 10 business days).
If you need to return an item, simply login to your account, view the order using the "Complete Orders" link under the My Account menu and click the Return Item(s) button. We'll notify you via e-mail of your refund once we've received and processed the returned item.
We can ship to virtually any address in the world. Note that there are restrictions on some products, and some products cannot be shipped to international destinations.
When you place an order, we will estimate shipping and delivery dates for you based on the availability of your items and the shipping options you choose. Depending on the shipping provider you choose, shipping date estimates may appear on the shipping quotes page.
Please also note that the shipping rates for many items we sell are weight-based. The weight of any such item can be found on its detail page. To reflect the policies of the shipping companies we use, all weights will be rounded up to the next full pound.