CHRYSOPRASE, MARLBOUGH CREEK, AUSTRALIA (cabinet)

Chrysoprase, also known as chrysophrase or chrysoprasus, is a type of chalcedony, which is a cryptocrystalline form of silica that contains trace amounts of nickel. Typically, it exhibits an apple-green hue, although its color can range from a turquoise-like cyan to a deep green. The darker shades of chrysoprase are often called prase, although this term can also refer to chlorite-included quartz and is more of a color descriptor than a strictly defined mineral category.