They are not even recognized in the market.
Tourmalines are gemstones found in various colors. They come in green, pink, red, blue, yellow, colorless and even black or multi-colored.
Paraiba tourmaline is an element found mainly in Sri Lanka. If one wishes to learn more about the element, the best place to look would be in a specialist geology book, or in an encyclopedia.
Paraiba tourmaline is the rarest and most expensive tourmaline. Paraiba tourmaline comes in a variety of colors in the blue to green ranges of extraordinary vividness. Its name is derived from the Paraiba state in Brazil, where it was first discovered.
Carat is the weight of Gemstone and to know how much is the weight of the multicolored Tourmalines you will have to weigh them. The value of the multicolor tourmaline depends on 4 C's - Cut, Carat, Clearity and Color.
augite is mined (found) in Italian volcanoes of vesuvious, stromboni, etna, and lazio
Gold can be mined in gold mines.....
it is found in places where gold is mined
Chlorine is a gas so it is not mined. It is manufactured by the electrolysis of a brine (salt) solution.
Bismuth is found with copper, zinc and other elements when they are mined. There is not enough of bismuth for it to have a separate mine.
Most are mined in pit mines. Some smaller ones are found by placer mining.
Marcelinho Paraiba.