Iceland Spar, also known as Optical Calcite, crystals in their raw, rough, natural form. The colouring is clear. These pieces are double refractive and, when placed over a drawn line or text at the right angle, the line or text will look as it it is doubled. This isn't too easy to see with some of the pieces, however, as they're more opaque.
This stone attracts good fortune and encourages forgiveness.
See more rough stones here
Country of origin: China
Size: 3.4 - 4.6 cm approx measured at the largest points
Weight: 35 - 44 grams