4.1" Large, Dark Purple Amethyst Crystal - Congo

This is a beautiful, 4.1" wide amethyst crystal with deep purple coloration and two terminations, collected from the Democratic Republic of the Congo. This crystal has undergone no color treatment or polishing.

The termination has some minor chipping.

Amethyst is a purple variety of quartz (SiO2) that owes its violet color to natural gamma irradiation, iron impurities, and the presence of trace elements, which result in complex crystal lattice substitutions. It is 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, where they are found in hydrothermally-formed geodes, but many localities around the world produce an amazing variety of amethyst crystals and formations. They are almost always formed in medium- to high-temperature geological settings.

Quartz var. Amethyst
Democratic Republic of the Congo
4.1" Wide