2.Non-destructive testing, simple and accurate operation. Technical characteristics The gemstones to be tested must be clean, dry and at room temperature.
eBay
Real gold will leave a mark on the stone while fake gold will dissolve or oxidize into blue color. It's an essential tool for jewelry enthusiasts to verify the authenticity of gold. 【Wide Application】: The Gold Testing Stone is practical for testing all types of jewelry pieces.
eBay
【Widely Applications】: Gold Testing Stone, Practical Jewelry Making Accessory, Ideal for testing jewelry, coins, antique gold, silver, platinum collectibles etc. 【Easy to Use】: Jewelry tester appraisal kit, Acid changes color based on purity, Very easy to use.
eBay
The SE Testing Stone is an essential tool for gold panning. It will help you determine whether the metal you've found is precious or not! In addition to determining whether a metal is precious or not, this stone can also test for karat content. It is meant to be used with testing solution and needles (not included). The stone itself is 2" x 1.5" x .25", and is a necessary tool for jewelry makers and hobbyists as well. Make sure to add one of these to your gold rush kit or jewelry making tools!.
eBay
As pictured very rare!
eBay
【Easy to Use】: Jewelry tester appraisal Set, changes color based on, very easy to use. 【Widely Applications】: Gold testing stone, practical jewelry making accessory, ideal for testing jewelry, coins, antique gold, silver, collectibles etc.
eBay
The ASR Outdoor Testing Stone is an essential tool for gold panning. It will help you determine whether the metal you've found is precious or not! In addition to determining whether a metal is precious or not, this stone can also test for karat content. It is meant to be used with testing solution and needles (not included). The stone itself is 2" x 1.5" x .25", and is a necessary tool for jewelry makers and hobbyists as well. Make sure to add one of these to your gold rush kit or jewelry making tools!.
eBay
1 Touchstone Kit (Glove color random). 【Widely Applications】Gold Testing Stone, Practical Jewelry Making Accessory, great for testing jewelry, coins, antique gold, silver, platinum collectibles etc. Material: Stone.
eBay