An oddity, this is an attractive well-formed Mica crystal with fine zoning and a sharp transparent window in the core. The outer zone of Lepidolite is a rose purple and shows thin color bands when backlit. This piece is from a small lot that arrived in 2017 and I have not seen anything like this since.
An very unusual older specimen from a find in the 1970's at Aracuai. The tourmaline crystal is both etched and prismatic with a large fibrous zone in the middle. The color zoning is unusual and includes the uncommon colorless (Achroite) variety. Ex Larry White collection, this is an attractive oddity and very different from other finds of fibrous Tourmalines. In good but not perfect condition, there is contacting and chips but not badly noticeable from some angles.