Testing Instructions

How to Use Our Testing Solutions

Professional-grade testing made simple. Follow these guidelines to accurately identify and verify precious metals.

Au

Testing Solution

Gold Testing Solutions (10K, 14K, 18K, 22K)

1 Rub item on test stone 2 Apply solution drop to streak 3 Observe results

If the streak remains unaffected, your material is at least that karat or higher. Use progressively higher karat solutions to determine exact purity.

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Pro Tip: Start with 10K solution and work your way up. If the streak dissolves with 14K solution but not 10K, your gold is 10K.

Ag

Testing Solution

Silver Testing Solution

1 Rub item on test stone 2 Apply solution drop to streak 3 Match color to chart

Results Guide

.999 Fine Silver Bright red color
.925 Sterling Dark red color
.800 Silver Brown color
.500 Silver Green color
Pt

Testing Solution

Platinum Testing Solution

1 Rub item on test stone 2 Apply solution drop to streak 3 Check for reaction

Results Guide

Platinum Streak remains unchanged
Not Platinum Streak dissolves or changes color
Palladium Streak turns red
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Essential Accessory

2x4 Black Testing Stone

Professional-quality testing stone designed for use with all our testing solutions. The dark surface provides excellent contrast for gold, silver, and platinum streaks.

✓ Reusable 1,000+ times ✓ Non-slip backing ✓ Easy to clean
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Care Instructions: Simply wash with water and mild soap between uses. The soft backing protects your work surface from scratches.

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400 Tests Per Bottle — Each bottle of testing solution provides approximately 400 tests, making professional-grade verification affordable for any volume.