Magnesite is not the most popular mineral for collectors but it can form outstanding specimens and crystals. However, its principal use is as a magnesium ore and a special refractory - a material where resistance to extreme temperatures is fundamental to an industrial process.
Dolomite is calcium magnesium carbonate, which can form outstanding crystals with wide variety of colors, often associated with other minerals. Less aesthetic dolomite form can build a whole mountain ranges and intrusions.
Outside well known collecting areas, the tiny Ústup village offers a little secret collecting spot with huge almandine garnets. And what is even more interesting, they were really used as a cannon balls!
Olivine is the most common mineral on Earth and very important rock forming mineral. The common term olivine refers to olivine group minerals and to IMA valid mineral forsterite. This article will focus on forsterite, which is very popular gem and forms crystals popular among collectors.
