Study guides, Class notes & Summaries

How are igneous rocks formed? A. In gas B. By erosion C. From a molten state D. By heat and pressure - C. From a molten state How can crustal diamonds form? A. Oceanic subduction B. Volcanic eruptions C. Meteorite impacts D. Radiation decay - C. Meteorite impacts How does metasomatism affect lithospheric diamond formation? A. Supplies heat B. Transports rock C. Removes oxygen D. Provides hydrogen - C. Removes oxygen What are the rock types where most diamonds form? A. Basaltic cr...

chemical element - consists of only one kind of atom mineral - inorganic. most minerals are a combo of 2 or more elements diamonds form - within 90-120 miles below earth's surface value factos - features used to judge the quality and value of stones - a diamonds value is based on its combo of the Four C's inclusions - clarity characteristic totally enclosed in a polished gemstone or extending into it from the surface. affect value most blemishes - clarity characteristic on the s...