Traces of garnet, zircon, topaz, and tourmaline occur. Artisanal miners produce gold and aquamarine, tourmaline, and other gemstones. Associated minerals include quartz, feldspar, spodumene, amblygonite, tourmaline, columbite, cassiterite, topaz and beryl. Common examples include calcite, quartz, topaz, beryl, tourmaline and fluorite, among others. Taaffeite occurs in carbonate rocks alongside fluorite, mica, spinel and tourmaline. Minerals associated with graphite include quartz, calcite, micas and tourmaline. It is commonly associated with topaz, cassiterite, wolframite, lepidolite, spodumene, beryl, tourmaline, and fluorite. Curling irons are typically made of ceramic, metal, Teflon, titanium, tourmaline. Brazilian paraiba tourmaline usually contains abundant inclusions. Gem and specimen tourmaline is mined chiefly in Brazil and Africa. These include spodumene, microcline, beryl, and tourmaline. Most of the intrusion is a tourmaline muscovite granite which is variably porphyritic. Matthew Forster Heddle found the quarry a good source for the minerals tourmaline and beryl. Some forms of tourmaline are dichroic; they change color when viewed from different directions. Native Americans have used pink and green tourmaline as funeral gifts for centuries.