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Unformatted text preview: will scratch glass. Cannot be scratched with a knife blade or masonry nail. Soft Minerals will not scratch glass. Can be scratched with a knife blade or masonry nail. Cleavage the tendency of some minerals to break along flat, parallel surfaces like the flat surfaces on broken pieces of galena. Fracture any break in a mineral that does not occur along a cleavage plane. Tenacity the manner in which a substance resists breakage. Reaction To Acid test minerals with acid to see if it fizzes. Striations straight hairline grooves on the cleavage surfaces of some minerals. Magnetism influence minerals, tested with magnet. Specific Gravity (SG) the ratio of the density of a substance divided by the density of water....
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This note was uploaded on 04/14/2011 for the course GEOL 101 taught by Professor Olinsky during the Spring '08 term at Texas A&M.
- Spring '08