Prehnite Natural 6-7mm Table Cut Cube A Grade - 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 stone's composition remains somewhat ambiguous

Approximate Hole Diameter: 2mm

or a sandy beach blending into a tropical bay

This variation mixes Blue Tiger Eye with Yellow Tiger Eye to bring out the best of each of the two stones

The blue colors are photosensitive and may fade when exposed to excessive light or heat

Chrysoprase is a bright apple green

iron or manganese imp

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

This lava rolled across the landscape

but can also appear silver

periwinkle