Calcite, (w. Hematite)

Mineral: Calcite, Hematite
Chemistry: CaCO3
Size: 144 mm
Owner: Geoff Krasnov
Photographer: Geoff Krasnov

An aggregate of sharp, intergrown rhombs (to 53 mm) of colourless to very pale-yellow calcite.  In the cores of the calcite crystals are scalenohedral phantoms, prominent because the early scalenohedral crystals appear to have been coated with hematite (?) before the later stage of rhombohedral calcite crystallisation commenced.