Jade - Jadeite and Nephrite
Jade has its cultural roots in the smoke-dimmed caves and huts that sheltered prehistoric humans. Around the world, Stone Age workers shaped this toughest of gems into weapons, tools, ornaments, and ritual objects. Their carvings invoked the powers of heaven and earth and mystic forces of life and death.
Jade is actually two separate gems: nephrite and jadeite. In China, a pierced jade disk is a symbol of heaven. Two different gem materials can correctly be called jade. Jadeite is one of them, and the other is nephrite. Both are actually metamorphic rocks made up of tiny interlocking mineral crystals. These interlocking crystals make both gems exceptionally tough.
Jadeite comes in a wide range of attractive colors: many shades of green, yellow, and reddish orange, plus white, gray, black, brown, and lavender (often a light purple or light grayish violet color). The coloration is often streaked or mottled, giving jadeite gemstones an interesting visual texture that carvers can use to create imaginative and intriguing effects.
Nephrite is also accepted as jade in the international gem and jewelry industry. It ranges from translucent to opaque and can be light to dark green, yellow, brown, black, gray, or white. Its colors tend to be more muted than jadeite’s, and they’re often mottled or streaked. Modern gemologists use the word “jade” as a generic term for both nephrite and jadeite. These gems have been linked throughout history.