Prehnite Natural 8X10mm Freeform Cut - 15-16 InchPrehnite 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.

the Dalmation dog breed

power and perseverance and is also considered a calming and protective stone

Shungite has been used as a folk medical treatment since the early 18th century

This makes sapphires very durable and scratch-resistant

It is opaque

golden brown and red

a microscopic protozoa with a silica shell

Queen Victoria’s granddaughter

It won 1st price and has been used ever since in sculpture

” which means that it can appear to be different colors as it shifts in the light

It has been mistaken for ruby and sapphire at times

It has a hardness of 8 on the Mohs hardness scale