Calcite (twin)

A classic twinned Calcite from Egremont.  This Calcite is termed a “heart-twin” and is colourless, gemmy, and very lustrous, with well formed striated termination faces.  Most unusually the twin has two prismatic Calcite crystals attached into it on one side, these are equally colourless and gemmy.  This is a large and well-formed Calcite heart-twin, from the West Cumberland Iron Ore Field.  The exact mine is unknown, but most of this habit of twinned Calcites principally originated from Gillfoot mine adjacent to, and partly beneath, the town of Egremont.  A magnificent Cumbrian “Heart-twin” Calcite.