LAB 4 WORKSHEET - Final

Lab 4 Worksheet - Mineral Properties and Identification Use the Directions to conduct your assessment/tests of mineral properties and then use the Mineral Key to make your identifications. IMPORTANT NOTE: the numbering on this worksheet must match the numbering in your photo. Sample Color Luster Note if luster is metallic or nonmetallic or nonmetallic. If non-metallic, make further descriptive notes on the luster Note: Hardness is based on Mohs Scale Place a check mark in only one box based on the most descriptive category for the mineral Streak Use the porcelain plate to determine the streak color. NOTE: if no powder is created, note “no streak” Cleavage or fracture Note if sample displays distinct planes of breakage (cleavage) or just has an irregularly broken surface (fracture) Other Diagnostic Properties Note if there is a presence of a sulfur odor, magnetism, striations on crystal faces, or reaction to weak acid (vinegar) Name of Mineral Use the Mineral Key to determine the name of the mineral VERY SOFT (< 2.5) - it can be scratched by fngernail SOFT (+/- 3) - it is harder than a fngernail but can be scratched by copper plate SOFT-MEDIUM (+/- 4) - it is harder than copper plate but can be scratched by steel nail MEDIUM (4-5.5) - it is harder than the steel nail but not hard enough to scratch glass plate HARD (> 5.5) – it cannot be scratched by the steel nail but can scratch the glass plate 1 clear Non-metallic, glassy x No streak fracture Quartz crystal 2 Ivory Non-metallic, glassy X white cleavage Calcite 3 Green Non-metallic, glassy x white cleavage Flourite 4 Ivory Non- metallic,glassy x No streak fracture Milky Quartz 5 Orange-ish Non- metallic,glassy x white cleavage salty Halite 6 Orange Non- metallic,glassy x white cleavage Feldspar 7 Ivory Non-metallic, pearly x white cleavage Gypsum 8 Grey Non- metallic,glassy x white cleavage Bytownite Page 1 of 3 BC Online – Physical Geology Lab (GLY1010L)