Bismuth Hopper Mineral Specimen x 1 From South Africa

PRODUCT DESCRIPTION 

Beautiful Bismuth Hopper Crystal Formation with its characteristic stepped, pyramid-like structure, with a hollow center. These are man made and formed like this with inverted Crystallisation when the edges of the crystal grow faster than the center during cooling. The rainbow colors are caused by a thin oxidisation outer layer zone, which creates light interference.  

PRODUCT DATA 
Locality = South Africa
Grade = A Grade
Size = 34 - 35 - 29 mm