Home > LĂ„ngban Minerals – January 23 > MS0874 Allactite

Allactite - Sold

Allactite is a hydrated manganese arsenate. Sjögren (1884) used material from the nearby Moss mine to describe the mineral, naming it for the Greek word for change in allusion to the strong pleochroism. Here allactite forms bladed crystals to 2 mm, forming a mass of crystals. Two separate pockets shows well developed transparent crystals.

This specimen was part of the personal collection of Ralph Merrill, proprietor of the prolific mail order business Minerals Unlimited. Merrill's collection card and label also ship with the specimen.