Hydrogrossular Garnet 10mm Round - 15-16 Inch Flat while today it is primarily

while today it is primarily mined in Africa

who performed early research into the many optical properties of mica

This dye was said to create Michelangelo’s favorite shade of blue

and many others

or color-enhanced

Hydrogrossular Garnet 10mm Round - 15-16 Inch Flat while today it is primarilyHydrogrossular garnet is an especially rare gemstone. It's defined by a bright green color, and most commonly found with black inclusions. These inclusions are chromite, and the green color is caused by a reaction in the stone when the chrome is introduced to water. The green coloring has likened the stone of jadeite in the past, and because its hardness has made the stone perfect for beads and cabochons, it has often been used as a substitute.