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The necklace might be the very first type of jewelry worm by man and woman. Looking back throughout the history of necklaces brings us back 75,000 years: a possible necklace fashioned out of over 40 mollusks was found in a cave in South Africa. A necklace made 30,000 years after was formed of teeth, bones, and shells, which were strung onto thread.

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Quartz is an extremely common mineral that can crystallize as a six-sided prism that ends with a six-sided pyramid. It is the second most common mineral, making up 12% of the earth’s crust, though most quartz does not form crystals. (Sandstone, for instance, is made of quartz.)

Read more on Semi-precious Gemstones: Quartz and Jade…