Prehnite Natural 6X8 Pebble SD A Grade - 15-16 Inch 5pf6192026 It is opaque

It is opaque

sometimes referred to as Crocodile Jasper for its deep green color and deep brown or black oval rings reminiscent of crocodile skin

where it was observed that the stone was often carried by eagles to their nests

but also for industrial purposes from watch gears and scientific instruments to sandpaper and other abrasives

Prehnite Natural 6X8 Pebble SD A Grade - 15-16 Inch 5pf6192026 It is opaquePrehnite was the first mineral to be named after a person: its discoverer, Dutch Colonel Hendrik Von Prehn. Von Prehn discovered the stone in South Africa in 1774. Prehnite is translucent to transparent, in colors from light green to yellow green to olive, with occasional inclusions of Black Tourmaline that crisscross the stone in fibrous patterns. It is a phyllosilicate composed of silicon, calcium and aluminum with trace amounts of iron.