Heterosite xl (large and rare) Whitmore Coll.

Item Description

Heterosite is a member of the Triphylite Group and Heterosite-Purpurite Series. The species of this series are secondary minerals formed by oxidation of iron and or manganese with the simultaneous leaching of lithium from primary phosphates (precursors). This is a huge and rare, equant, orthorhombic crystal with good luster and pretty lavender color. It is rare from this well-known Groton pegmatite and this is a huge crystal from the mine owners collection. Ex Robert Whitmore Collection # 3360, collected in 1968 and obtained by Whitmore in 1992.