Reddit reviews 10K, 14K, 18K, 22K Gold and Silver Test Acid Economy Test Stone and Basic Instructions Kit Tools
We found 3 Reddit comments about 10K, 14K, 18K, 22K Gold and Silver Test Acid Economy Test Stone and Basic Instructions Kit Tools. Here are the top ones, ranked by their Reddit score.
One bottle of 10 karat gold testing acidOne bottle of 14 karat gold testing acidOne bottle of 18 karat gold testing acidOne bottle of 22 karat gold testing acidOne bottle of silver testing acid
Spend $15 on an acid test kit and you can assay precious metals yourself.
Those who suggest you test density or conductivity, no offense to them, don't know what they're talking about.
If you can't find any obvious markings that will tell you what it is you can't take it to a gold buying shop and they'll do an acid test on it, or you could get something like this and do it yourself
https://www.amazon.com/gp/aw/d/B000VAZB8K/ref=mp_s_a_1_2?ie=UTF8&qid=1525733116&sr=8-2&pi=AC_SX236_SY340_QL65&keywords=acid+test+gold+kit&dpPl=1&dpID=51JO485rv
Time to get an acid test kit. I can't say from a picture.