Topaz with Columbite and fluorite
A rare Niobium and Tantalium mineral very difficult to find pure. Normally is mixed with Tantalite forming prismatic crystals, rarely acicular or fibrous .
Quite often we can see these needles-like forming a cluster or floating in the topaz like spears in the sky .In this case is associate also some colorless fluorite crystals.
From Minas Gerais, Brazil.