TrueAssay
Silver Testing Kit – Acid Solution + Testing Stone (.500–.999 Silver)
Silver Testing Kit – Acid Solution + Testing Stone (.500–.999 Silver)
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Everything You Need to Test Silver — In One Kit
The TrueAssay Silver Testing Solution + Stone kit has everything you need to authenticate silver in seconds. Distinguish .999 fine, .925 sterling, .800, and .500 silver with a single drop on the included testing stone. Reusable, reliable, and safe for your jewelry.
What's Included
- TrueAssay Silver (.925/.999) Testing Solution
- 2x4 Black Testing Stone with non-slip backing
- Freshly mixed, US-made, tamper-evident bottle
How to Read the Results
Rub your item on the testing stone to leave a silver streak, then apply one drop of solution:
- Bright red = .999 fine silver
- Dark red = .925 sterling silver
- Brown = .800 silver
- Green = .500 silver
- No color / clear = not silver or heavily plated
About the Testing Stone
Our 2x4 black testing stone shows streaks clearly from gold, silver, and platinum. It's washable and reusable for thousands of tests. The soft non-slip backing keeps it in place and protects your work surface.
Who This Is For
- Jewelers and jewelry repair shops
- Pawn shops and silver buyers
- Coin and bullion dealers
- Resellers sourcing from estate sales, thrift, and auctions
- Private buyers verifying inherited or online-purchased silver
Why TrueAssay
- Freshly mixed in the USA — potent, reliable reactions
- Solution + stone combo — ready to test out of the box
- Clear color chart — easy-to-read results for every purity
- Trusted by thousands of Amazon and Shopify buyers
Frequently Asked Questions
Will this damage my silver?
No. Testing happens on the stone, not on your item.
Does it work on plated silver?
Surface tests can read plating as solid silver. For suspected plated items, file a small notch to expose the base metal and test that streak.
How do I clean the testing stone?
Rinse with water and wipe with a cloth between tests. The stone is reusable thousands of times.
How many tests per bottle?
Approximately 400 tests per bottle when using single drops.
Safety First
This solution contains strong acids. Wear gloves and eye protection, work in a ventilated area, and keep away from children and pets. In case of skin contact, rinse immediately with plenty of water. See the included SDS for full handling details.
Disclaimer
Acid testing is a screening method. For high-value items, confirm results with XRF analysis or a certified assay.
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Trusted by Industry Professionals
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Lab-Tested Quality
Each batch is formulated to professional-grade testing standards used by jewelers and refiners.
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Fast U.S. Shipping
Orders ship same-day from Atlanta, GA. Most U.S. customers receive in 2 to 5 business days.
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Helpful Customer Support
Questions about testing technique or kits? Reach our team for guidance before and after your purchase.
Frequently Asked Questions
How do I use the testing solution?
Rub the metal on a testing stone, apply a drop of acid to the streak, then compare the color reaction to the standard chart for that karat.
How fast does my order ship?
Orders placed before 2 PM EST ship the same business day from Atlanta, GA. Most U.S. orders arrive in 2 to 5 business days.
Are these solutions safe to handle?
Our acid solutions are professional-grade and should be handled with gloves and eye protection in a well-ventilated area. SDS sheets are available on request.
What's your return policy?
Unopened items can be returned within 30 days of delivery. Opened acid bottles cannot be returned for safety and shipping reasons.