Prehnite 12x16-18x25mm Jagged Rough Collar DSforGB1032023 White Howlite is named for

White Howlite is named for Canadian mineralogist Henry How

Like all other natural turquoise

with bands of white Onyx running through it

Tourmaline occurs in nearly every color in the rainbow and its name derives from “turmali

Prehnite 12x16-18x25mm Jagged Rough Collar DSforGB1032023 White Howlite is named forPrehnite 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.