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tsamorita 

Sirena is growing to be a beautiful tsamorita .
tsamorita by Tsamoru February 11, 2014
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Trevorite 

Trevorite is a rare nickel iron oxide mineral belonging to the spinel group. It has the chemical formula NiFe3+2O4. It is a black mineral with the typical spinel properties of crystallising in the cubic system, black streaked, infusible and insoluble in most acids.
Woah your Trevorite shines brightly!