Abalone Shell 15mm Flat Coin - 15-16 Inch *CHKRA-SPL an opaque silicon dioxide mineral

an opaque silicon dioxide mineral and form of microcrystalline Chalcedony

5 cm (5 3/8 in)

Amazonite is named for the Amazon River in Brazil

Rocky Butte Jasper strands are predominantly shades of gray

Abalone Shell 15mm Flat Coin - 15-16 Inch *CHKRA-SPL an opaque silicon dioxide mineralAbalone Shell is strong and is made of stacked calcium carbonate tiles. When the abalone shell is struck, the tiles slide instead of shattering absorbing the energy of the blow. The inner layer of the shell is composed of nacre (mother of pearl), which in many species is highly iridescent, which make the shells attractive as decorative objects, jewelry, and as a source of colorful mother of pearl.