Raw Amethyst NecklaceThis minimalist amethyst necklace is a lovely ode to the variety and beauty of earth's crystals. Amethyst is a purple colored quartz, and was once considered to be in the same category as diamonds, sapphires, rubies, and emeralds. It has a chemical composition of SiO2, a trigonal crystal system, and (among other ways) it obtains its color from substitution by irradiation of trivalent iron Fe3+ for silicon. Each necklace is unique, incorporating a raw

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based on star maps

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disulfide bonds

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Fancy enough for special events and simple enough for daily wear

so you can be of help to others

A wonderfully detailed piece from a hand-carved original

using a halo orbit to circle around the L2 Lagrange point

The Klein bottle is a fascinating topological shape first described in 1882 by German mathematician Felix Klein

anyone who works with young children and likes to make them smile

An exceptional science teacher can open up grand vistas of interest and inquiry for their students