Mineral: | Tourmaline, Variety: Liddicoatite / Mica, Variety: Muscovite
| Chemical Formula: | Ca(Li2Al)Al6(BO3)3Si6O18(OH)3F / KAl2(Si3Al)O10(OH,F)2 | Size: | | Weight: | | Transparence: | translucent - transparent | Quantity: | | Origin: | Minh Tien Mine, Luc Yen ("Yuang Yang"; "Yueng Yang"), Yenbai (Yen Bai) Province, Vietnam | A very old cabinet from Luy Yen, found in 2004. the big crystal is a bit loose imbedded in the mica, but it's natural grown this way , due to the unconstrained muscovite matrix. Rare old cabinet specimen
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