EOSC 118 Study Guide - Chrysoberyl, Chromophore, Pegmatite

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

Document Summary

"maxixe-type" beryl found only in brazil, dark velvety blue but color fades in light: common treatments for. Sapphires at the farthest distance from the larger magma body (or cooled intrusion) that the pegmatite emanates from: natural: noon sunlight, well balanced, incandescent lamps: skewed towards warm red, fluorescent lamps: "cool white", output blue and green. Light to dark blue, most coveted is deep blue. Larger clearer crystals than emeralds: are some emeralds more. Sapphire: burmese sapphires, characteristics of beryl, chelsea filter, chromophore. Colorful, hard, resistant to acids, form large crystals, hexagonal prisms. Aka emerald filter, color filter, only allows red and green to pass through. Element responsible for coloration of mineral ie. cr in emerald which gives it green hue: crest: Minerals that display different colors depending on crystallographic direction of the stone being viewed: diamond testers. Test electrical conductivity: dichroscope determining optic class a mineral or gem belongs to, electromagnetic.