Moissanite is a synthetic gem that shines better than diamonds.

und in lava, meteorites, and deep in the earth’s mantle, yellow-green peridot is the extreme gem.

concretion formed by a mollusk consisting of the same material (called nacre or mother-of-pearl) as the mollusk’s shell

gemstone composed of transparent red corundum (q.v.), a mineral form of aluminum oxide, Al₂O₃

Yellow Sapphire represents divine grace and power. It is considered to be one of the safest gemstones