sci 245 study notes

Apr 18th, 2015
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Mineral Identification WorksheetThe four requirements of a material to be classified as a mineral are:1)It must be naturally occurring 2) It must bean inorganic solid i.e it cannot be made of plant or animal material.3) It should have a definite chemical composition and 4) it should have a specific crystalline structure.To differentiate between minerals the following properties are generally used:Color - this varies depending on the chemicals present and is the least informative in identifying a mineral variety Luster - what the surface looks like in the light Specific Gravity - how heavy it feels, heft Crystal Form - shape of crystal, shape the mineral would take if it had room to grow in a cavity, not massive - some minerals have a number of different crystal shapesCleavage - pattern when mineral is broken - in planes or conchoidal Fracture ,Tenacity - toughness, how cohesive the mineral is, if it falls apart Hardness - what it can scratch & what scratches it Transparency - The ability to transmit light. Depending on a number of things, rocks & minerals can also transmit light. Many rocks that are opaque when in a chunk, are translucent when cut into very thin

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