Trusted Accuracy for Over 40 Years

Made in the USA, JSP gold and silver testing acids deliver professional precision and freshness you can count on — never imported, never expired.

KNOW THE VALUE OF YOUR PRECIOUS METALS BEFORE YOU SELL!

Jewelry Testing Kits

Why Choose JSP

Each JSP testing solution is precision-formulated and freshly bottled in the USA under strict quality control. Our bottles are three times larger than standard import kits, giving you more use, stronger reactions, and consistent results.

Trusted by professionals since 1983, JSP acids deliver unmatched accuracy and shelf stability — never imported, never expired, always fresh.

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GOLD REFINING & RECOVERY

Looking to refine your Gold?

Experience the pinnacle of gold refining with GTE's advanced chemicals. Our innovative solutions redefine purity, ensuring that your precious metals shine with unmatched brilliance.

GOLD REFINING KITS

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MOST POPULAR

JEWELRY TEST STONES

PREMIUM TEST KITS

99% ACCURACY

We know how important it is to get the most bang for your buck when selling your precious metals! Our top quality Gold, Silver, Platinum and Diamond tester kits quickly determine the purity and precious metal content, GUARANTEED!

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Satisfied Customers

  • ⭐⭐⭐⭐⭐

    AMAZING!
    Thank you. Very professional packaging and highly recomended if you want a great no hastle experience. A++++!!!

    _Spendthrifty's

  • ⭐⭐⭐⭐⭐

    100% FRESH. Thank you! The acid testing kit was fresh, factory sealed, and arrived quickly packaged in a bubble wrap envelope! I def will buy from again!

    _The_Corner_Gypsy

  • ⭐⭐⭐⭐⭐

    GREAT. Wonderful exactly what I wanted. Perfect and fast delivery. Couldn't be happier with my purchase, I truly appreciate everything!

    _Kim Norris