Pentagonite

Pentagonite is considered a sister of Cavansite as both have same chemical composition, although a different crystallization structure. While Cavansite usually forms in flower-shape or packed crystals forming balls, Pentagonite begin to form in similar way but end up with thin, long needle-like crystals due to specific geological condition. While Pentagonite boasts an intense blue color as well, it is slightly distinct than Cavansite. If Cavansite is considered rare, Pentagonites are even rarer.

Locality: Wagholi, Pune, India