We are the distributor for African Pietersite which many confuse
with Marra Mamba. Pietersite is formed by a process known as
brecciation. The fibrous structure of both Tiger Eye and Hawk Eye are
broken via the earth's geologic process. The tiny fragments are later
naturally cemented together by quartz creating a finished product
with multiple hues and superb chatoyancy. The boulders outside, and
occasional pockets inside, can be 'hairy' or fibrous looking.
The solid portions cut and polish excellent and are stable. I
believe Marra Mamba would cut and polish in a similar manner.