Tin Skarns: Associated with “tin granites”, which are reduced and enriched in fluorine, rubidium, lithium, tin, beryllium, tungsten, and molybdenum. A distinctive feature is the greisen alteration stage characterized by fluorine-rich minerals like fluorite, topaz, tourmaline, muscovite, grunerite,...
Cinnabar - the only important ore of mercury. Used in pigments until its toxicity was realized. LepidoliteLepidolite is a pink to purple mica used as an ore of lithium and as a gem material. Tumbled StonesTumbled Stones are rocks that have been rounded, smoothed and polished in a rock ...