TrueAssay
High-Karat Gold Testing Kit – 18K/20K/22K with Stone & Acid Neutralizer
High-Karat Gold Testing Kit – 18K/20K/22K with Stone & Acid Neutralizer
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The High-Karat Gold Testing Kit
Purpose-built for buyers who handle high-karat gold. Pinpoint 18K, 20K, and 22K gold with precision and neutralize acid residue between tests for consistently clean, accurate results. Perfect for coin dealers, bullion buyers, and jewelers working with fine gold.
What's Included
- TrueAssay 18K Gold Testing Solution
- TrueAssay 20K Gold Testing Solution
- TrueAssay 22K Gold Testing Solution
- TrueAssay Acid Neutralizer Solution
- 2x4 Black Testing Stone with non-slip backing
- Freshly mixed, US-made, tamper-evident bottles
How to Test High-Karat Gold
- Rub your item on the testing stone to leave a visible gold streak.
- Apply a single drop of the karat solution directly onto the streak.
- If the streak stays, your item is that karat or higher.
- Work up through 18K → 20K → 22K to pinpoint the exact karat.
- Apply acid neutralizer, then rinse and dry the stone before the next test.
Why the Acid Neutralizer Matters
Leftover acid on your stone can skew results and corrode your workspace. TrueAssay's neutralizer instantly stops the reaction, keeps your stone ready for the next test, and makes cleanup safer.
Who This Is For
- Coin and bullion dealers handling fine gold
- Jewelers specializing in 18K+ pieces
- Pawn shops and precious metal buyers
- Resellers sourcing imported or high-karat gold
- Collectors verifying investment-grade pieces
Why TrueAssay
- Freshly mixed in the USA — potent, reliable reactions
- Complete high-karat coverage — 18K, 20K, and 22K in one kit
- Acid neutralizer included — safer cleanup, more accurate repeat tests
- Trusted by thousands of Amazon and Shopify buyers
Frequently Asked Questions
Will this damage my gold?
No. Testing happens on the stone, not on your item.
How do I use the neutralizer?
After reading the test, apply a drop of neutralizer to the stone to stop the acid reaction. Then rinse with water and wipe clean.
How many tests per bottle?
Approximately 400 tests per bottle when using single drops.
Can I buy refills separately?
Yes — individual TrueAssay solutions and neutralizer are available in our store.
Safety First
These solutions contain 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.