The first glass was natural obsidian from volcanoes, used long ago to make arrowheads, knives, jewelry, etc.
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Sand is finely ground quartz, silica, and other geological materials, including gemstones.
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Shells are, of course, strongly associated with the element of water, as well as the moon, which drives ocean tides.
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Granite is composed primarily of quartz and feldspar. It is an igneous rock and is formed from magma.
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