Iceland Spar-Optical Calcite Rhomboid Cube amethyst weighs 533g and is 12

weighs 533g and is 12

often formed through volcanic activity

weighs 241g and is 12

Full of shimmering sparkle and delicate white "snowflake" inclusions throughout

heated amethyst citrine can be a lovely addition to your jewelry collection

Iceland Spar-Optical Calcite Rhomboid Cube amethyst weighs 533g and is 12Beautiful Rainbow filled Iceland Spar Optical Calcite Rhomboid Cube This beautiful large high grade Iceland spar cube is a great example of optical clarity, allowing for a stunning display of gorgeous internal rainbows as light plays within its perfectly formed structure. Its beautiful transparency highlights the captivating double refraction effect, a hallmark of this unique calcite variety. Quite rare to get this size intact Weighs 908g and is 13cm