description Orthoclase Overview
Orthoclase is a potassium-rich tectosilicate feldspar with the ideal formula KAlSi3O8 and a monoclinic crystal structure. It is a common rock-forming mineral in igneous rocks and also occurs in some metamorphic and sedimentary settings. Transparent yellow to champagne orthoclase may be faceted as a gemstone, while microscopic intergrowths of orthoclase and albite produce the adularescence seen in the feldspar gem variety moonstone.
help Orthoclase FAQ
How good is Orthoclase?
Orthoclase scores 4.42/10 (Poor) on Lunoo, making it rated in the Gemstone category.
What are the best alternatives to Orthoclase?
See our alternatives page for Orthoclase for a ranked list with scores. Top alternatives include: Golden Beryl, Sanidine, Grandidierite.
How does Orthoclase compare to Golden Beryl?
See our detailed comparison of Orthoclase vs Golden Beryl with scores, features, and an AI-powered verdict.
Is Orthoclase worth it in 2026?
With a score of 4.42/10, Orthoclase is a solid option in Gemstone. See all Gemstone ranked.
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