Prehnite 4mm Round Faceted AA Grade - 15-16 Inch featured_04182024 which may range from yellow

which may range from yellow to green to olive green to brownish green

Famous malachite mines in the Ural mountains of Russia once produced 20 to ton blocks of the stone

creating a beautiful blend of pink and green in mottled patterns

crystallized and infused in Quartz

The most common include: purple lepidolite

Prehnite 4mm Round Faceted AA Grade - 15-16 Inch featured_04182024 which may range from yellowPrehnite 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.