Black Spinel from Mogok in Burma.
A large main crystal at the top of the sample.
The matrix is made up of a cluster of very small
black spinel crystals.
Spinel is found in metamorphic rocks derived
clayey and calcareous sediments.
The most beautiful are cut as gems.
Sample size 45x35x25 mm.
Spinel primary measure 15x20 mm.
Weight 73 gr.