Identifying Gem Stones – Step 3:
Cleavage:
This refers to the tendency of crystals to break along fixed planes in their structure. By striking the crystalline gem stone, you can examine the break and compare it to various cleavage charts.
Many gem stones, including quartz and mica, are easily identified by this way. If you suspect that your gem stone is extremely valuable, like a diamond, you may want to skip this step.
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