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Point it at the sky and see the lines that correspond to hydrogen burning in the sun and oxygen being absorbed by the atmosphere
that one was a forgery
Built-in storage compartment for pen probe
and each result has a characteristic bleep
all you need to know is: it's not diamond
Set of 11 diamond colour-grading stones by Gemoro Resolution_0.01g Point it at the skyDetails The only way to colour grade diamonds is to match the colours against carefully graded samples. Here are 11 carefully colour graded stones, 1. 00ct each, colours D to N. This set is unique in that it has 11 stones, and also because it has a built in UV light (with a USB rechargeable battery). Please note, these are colour grading stones for diamonds, they are not diamonds (they are Cz).