orthoclase variety moonstone also known as white labradorite from feldspar with schiller
A small sample of rough moonstone
Moonstone is a sodium potassium aluminium silicate ((Na,K)AlSi3O8) of the feldspar group that displays a pearly and opalescent schiller. An alternative name for moonstone is hecatolite (from goddess Hecate).
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Discovered by embedding cosine similarity (sentence-transformers MiniLM, 384-dim).