Topaz is a silicate mineral known for its wide colour range, including yellow, blue, pink, peach, green, red, and brown, as well as colourless. Topaz forms in igneous rocks like pegmatites and rhyolites, and it's also found as water-worn pebbles in stream sediments. Major sources of topaz include Brazil, Russia, Afghanistan, Sri Lanka, and the United States, particularly in Utah and Texas.
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