Stunning Amethyst Crystal with Calcite - Namibia

This is a pristine mineral specimen, containing an association of quarts var. amethyst, branching from a rocky matrix covered in both rhombohedral and pointed calcite crystals. The 1.9" amethyst crystal on this specimen is incredibly transparent and has no damage to any of its well formed faces, or terminations.

Amethyst is a purple variety of quartz (SiO2) and owes its violet color to natural irradiation, iron impurities, and the presence of trace elements, which result in complex crystal lattice substitutions. It’s considered a semi-precious gemstone, and just two centuries ago was considered to have a value on par with diamonds, sapphires and rubies. The largest and best known amethyst deposits occur in southern Brazil and Uruguay but many localities around the world produce an amazing variety of amethyst crystals and formations.
Quartz var. Amethyst & Calcite
Goboboseb Mountains, Brandberg Area, Namibia
4.0" long, 3.2" wide, 2.4" tall. Amethyst is 1.9" long