Moonstone is an alkali feldspar, usually orthoclase with albite layers, that shows adularescence. It is not its own species. The sheen is light scattered by thin feldspar layers.
This page is only for Moonstone. Comments below are for this material.
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Moonstone
Specimen Details
- Hardness (Mohs): 6–6.5
- Chemical Formula: (K,Na)AlSi3O8
- Crystal System: Monoclinic
- Size: Specimen size varies; record the piece, not the species