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Geosciences LibreTexts

6.3: Fracture

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  • Fracture is the random breakage of a gemstone when being hit with a sharp or hard object along a direction other than then the direction of cleavage or parting. The most common type of fracture is termed "conchoidal" (shell-like).

    The types of fracture are:

    • conchoidal
    • uneven
    • even
    • splintery
    • granular


    • Gemmology 3rd edition (2005) - Peter Read
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