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|Source||Mysteltainn, Acorn Exchange Quest, Lovers Quest|
|Cost to buy||--|
|Cost to sell||1,500 Zeny|
A common dark mica. Symbolizes spiritual support.
- Biotite is a common phyllosilicate mineral within the mica group, with the approximate chemical formula K(Mg,Fe)3AlSi3O10(F,OH)2. It was named by J.F.L. Hausmann in 1847 in honor of the French physicist Jean-Baptiste Biot who, in 1816, researched the optical properties of mica, discovering many unique properties.