Natural cubes of pale yellow Calcite from Brazil that are filled with rainbows. 

Measurements (this listing is for one piece from this range): 100-150 grams, 1.25in-1.5in

This listing is for one Optical Yellow Calcite from Brazil, it will be similar to those photographed but please note that each is in its natural state as it came from the Earth and will differ. All crystals have been hand-selected for quality and aesthetics so you can rest assured that you will receive a beautiful piece.