Opal Gem Jar Ca)₈Al₆Si₆O₂₄ (S

Ca)₈Al₆Si₆O₂₄ (S

Commonly found in Mexico

One of the world's most famous pieces of spinel jewelry includes the Black Prince's Ruby

sweetgrass

roughly 150 million years ago

Opal Gem Jar Ca)₈Al₆Si₆O₂₄ (SOpal is a form of amorphous silica. This means it forms with no true crystal structure. Opal can naturally contain up to 20% water. Opal is not a mineral, but a mineraloid because of its lack of structure. On a microscopic scale, opal contains spheres of silica, giving rise to the flashes of color we all know and love. The matrix associated with opal can be almost any visible color, most commonly white, occasionally black. Opal is used in helping