In fact is an iridescent andradite garnet is one of the most interesting member among the garnet family.
It is found in Sonora ,Mexico and Nora ,Japan.This crystal here is from Japan . This is an opaque brown Garnet that reflects rainbow colors at the surface when light hits it at just the right angle. The rainbow color is due to interference colors and light diffraction resulting from stratified growth layers.Untreated and unpolished.Lot of 2 pcs.
Size: 5.5x4.5---6.4x5.5 mm.
Weight: 2.02 ct.