Measurements: 100 x 70 x 65 mm
Description: Pale green blades of prehnite cover a plate of pale amethyst quartz crystals.
Most of the prehite blades are damaged, as are some quartz crystals on the edges.
This specimen came from an optical calcite mine, which is nou defunct.
Weight of Specimen: 346 g
Composition: Ca2Al2Si3O10(OH)2 (prehnite)
Soetwater near Calvinia, Western Cape,
Specimen Code: WC 042