EOSC 118 Lecture 22: Lesson 22

• School: UBC
• Department: Earth and Ocean Sciences
• Course: EOSC 118
• Professor: David Turner

Document Summary

Jadeite pyroxene: a variety of tremolite or actinolite. Subduction zones: myanmar is a major source of jadeite. Other sources are japan and california: nephrite amphibole, made of fibrous silky crystals, more common and widespread, stone tougher than steel, dark green- colored by iron, cream colored by magnesium, white- pure tremolite. Called mutton-fat jade : used for tools and weapons, and chinese carving, formed in metamorphic ultramafic rocks, found in china and new zealand, virtually all european jade, europeans told by aztecs that jade cured internal ailments. Liver, spleen, and kidney: nephrite name derived from nephrus, meaning kidney, spanish called it piedra de ijada , french called it pierre de jade . Ammolite: new gemstone produced almost exclusively from canada, discovered along the st mary river in southern alberta, the geological formation that hosts ammolite is the bearpaw formation, dark grey shale with layers containing ammonite fossils. Korite international and aurora ammolite mining produce ammolite.