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.
Anatase is rare and highly aesthetic form of titanium oxide, which occurs almost exclusively in Alpine environment. It's great combinations with adularia and quartz are very popular among collectors. But it also has some unique physical properties, which are used in hi-tech applications.