Prehnite with Rutilate 10mm Round - 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.

Approximate Size:   3x4 Inches / 76x101mm / 7

initially as tools because of its hardness

a phenomenon that occurs when light hits the chips of silica inside the gemstone and a rainbow of different colors refract inside the stone

The term “fluorescent” was inspired by Fluorite

who performed early research into the many optical properties of mica

When moving through the Earth’s atmosphere

Natural Turquoise may be cut and polished

Pietersite is composed of Tiger Eye

Jasper has a long and illustrious history

Topaz is found in many locations worldwide where rocks like pegmatite and rhyolite are formed

creating veins and mottling that ranges in color from rust to black

It is named for the Amazon River in Brazil