Lab 1Identifying Common Rock-Forming MineralsInstructions1. Use the Alphabetical Mineral Index (Table 1.1) or the MineralIdentification Key(Table 1.2) to identify the minerals in your rock kit.a) To use the Mineral Identification Key (Table 1.2), you mustfirst determine theluster (non-metallic or metallic) of a mineral specimen. Mineralswith non-metallic luster are further divided into hard or soft based onwhether or not themineral can scratch glass; then divided again on the basis ofwhether the mineralexhibits cleavage or fracture. Minerals that are metallic aredivided into onlytwo categories: those that exhibit cleavage and those that donot.b) In the Mineral Identification Worksheet record the sample numberof eachmineral specimen. Evaluate or test the physical properties of themineral anduse the identification key to identify the minerals provided.2. Turn in your work on the due date given by the instructor.
Name ________ _________
Mineral Identification Worksheet for Lab 1
#
Luster
Hardness
Range
Cleavage/
Fracture
Streak/
Color
Other Properties
Mineral Name
Lab 1 Identifying Common Rock Forming Minerals Instructions 1 Use The Alphabetical Mineral Index Table 1 1 Or The Min 1 (54.18 KiB) Viewed 14 times
Figure 1 THE MINERALS OF THE MOHS HARDNESS SCALE Minerals of Mohs Hardness Common Scale Objects 1. Talc 2. Gypsum 3. Calcite 4. Fluorite 5. Apatite 6. Potassium Feldspar 7. Quartz 8. Topaz 9. Corundum 10. Diamond Fingernail Copper Penny Knife blade Glass plate Steel file
0 1 Number of Cleavage Directions No cleavage, only fracture Planar 2 at 90° 2 not at 90° 3 at 90° 3 not at 90° 4 Shape Flat Sheets Elongated form with rectangular cross-section Elongated form with parallelogram cross- section Cube Rhombohedron Octahedron Sketch Directions of cleavage PAS
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