Dragon Minerals - April 25, 2022 Update

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29194: Londonite - Rhodizite (15 crystals) - $15
Manjaka, Sahatany Valley, Ibity, Antsirabe II, Vakinankaratra, Madagascar
1.4 grams
Specimen status: Available
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A group of 15 yellow, translucent londonite-rhodizite crystals, 2-4 mm in size. All exhibit dodecahedral morphology to some extent. Potassium-dominant rhodizite - (K,Cs)Al4Be4(B,Be)12O28 and its cesium/rubidium-dominant analog londonite - (Cs, K, Rb)Al4Be4(B,Be)12O28 are chemically similar borates, often intergrown, and cannot be distinguished without chemical analysis.

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