A crystal or crystalline solid is a solid material whose constituents, such as atoms, molecules or ions, are arranged in a highly ordered microscopic structure, forming a crystal lattice that extends in all directions. In addition, macroscopic single crystals are usually identifiable by their geometrical shape, consisting of flat faces with specific, characteristic orientations.
ex. Don Belsher Collection
Location: Minas Gerais, Brazil
Calcite Pseudo-morphed after Ikatite.
Calcite Pseudo-morphed after Ikatite.
Calcite Pseudo-morphed after Ikatite.
Calcite Pseudo-morphed after Ikatite.
Gypsum forms concretions of selenite blades called desert roses or sand roses, growing in sediments that are subjected to concentrated brines.
Gypsum forms concretions of selenite blades called desert roses or sand roses, growing in sediments that are subjected to concentrated brines.
Gypsum is a soft mineral, hydrous calcium sulfate. Gypsum is the standard for hardness degree 2 on the Mohs mineral hardness scale.
This is a nice little piece of clear Gypsum, also known as Selenite.