Verdite

Verdite is a fine-grained, deep green metamorphic rock composed largely of fuchsite, the chromium-rich green variety of muscovite mica. Its intense color and soft, workable texture have made it a favorite carving stone, especially in southern Africa where the finest material is mined.

The rock often shows mottled patterns, with the green ground broken by red, brown, or yellowish patches and occasional ruby-colored inclusions. Quality grades from common opaque stone to fine, even-colored material used for sculpture and jewelry.

Verdite is sometimes marketed as African jade, though it is mineralogically unrelated to true jade.

Verdite forms by the metamorphism and alteration of ultramafic and chromium-bearing rocks. Chromium released during alteration is incorporated into muscovite mica, producing the green fuchsite that gives verdite its color.

The process typically occurs at relatively low to moderate metamorphic grades in ancient greenstone belts, where chromium-rich source rocks were altered by fluids and metamorphic recrystallization. The accessory minerals and impurities present produce the characteristic mottling and color variation.

The most famous deposits lie in South Africa and Zimbabwe, in some of the world's oldest crust, where verdite has been quarried for ornamental use for many decades.

Look for a dense, deep green stone with a slightly waxy to dull luster and a soft feel; it can be scratched by a steel knife because its hardness is only about 3-4. Mottled patches of red, brown, or yellow against the green are characteristic.

The green color comes from chromium in fuchsite mica, and fine flakes may give a subtle sparkle. Verdite takes a smooth polish, valued for carving.

Look-alikes: true jade (jadeite and nephrite) is far harder (6.5-7) and will not be scratched by steel; serpentine is similar in look but typically lighter and waxier; malachite is banded green and effervesces clues differ. The softness is the quickest distinguishing test from jade.

Verdite is chiefly a carving and ornamental stone. Its softness and rich color make it ideal for sculpture, figurines, beads, cabochons, and decorative objects, and southern African artisans have long used it for traditional and tourist carvings.

In jewelry it is cut as cabochons and beads, often sold under the trade name African jade despite having no relation to genuine jade. Higher-grade, evenly colored pieces command better prices.

In metaphysical circles verdite is associated with heart-centered healing, grounding, and connection to ancient earth energy, owing to its great geological age. These uses are traditional beliefs, not scientifically established.