Just as wood is easier to split with the grain than against it, mineral cleavage is the tendency of certain crystals to break along definite plane…
Diamond is the hardest natural material in the world. However, it’s also brittle. Scientifically speaking, hardness measures the ability…
The optical properties of minerals attract our eyes and can give a specimen a unique character. However, mineral physical properties are also…
If you’ve ever seen a gem or mineral appear to glow, you’ve witnessed luminescence. This phenomenon occurs when electrons in certain atoms…
Although gemstone magnetism isn’t a commonly tested gemstone property, it may be useful for making quick separations outside the lab. By Richard…
Minerals may be dyed to enhance their color. Distinguishing natural from enhanced stones is an essential skill for mineralogists. The…
In some cases, a hot point test won’t distinguish plastic simulants from natural stones. Some plastics release a protein smell when hot…
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