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This gemstone is well-known for its "play-of-color," or ability to shift color. Opals often have a kaleidoscope of colors on their surface. This birthstone symbolizes purity, hope and truth.
Each month has at least one representative gemstone. Here's what you need to know about November's birthstones: ... Citrine is a type quartz, with its colors ranging from yellow to brown-orange.
Crystal expert Patrick Gundersen recently found a priceless quartz hidden in the dirt of Australia's Northern Territory. The crystal hunter said he does not intend to sell the gem.
Amethyst, for example – which you might not realize counts as quartz, but definitely does – owes its purple hue to the presence of iron, irradiated by gamma rays from the rock surrounding the gem.