Section: Date: Course: In following table, indicate what physical property you t

Question

Section: Date: Course: In following table, indicate what physical property you think would make a mineral appropriate for the use indicated, and name a mineral from your set that could be used for this purpose. In some instances, more than one mineral will meet the requirements and more than one property is required. Economic use Physical property or properties needed Minerals Abrasives (e.g, sandpaper) Old-time window coverings before glass was widely available Modern window panes Writing on paper Lubricant for locks After-bath powder Bright eye shadow Pigment for paints Navigation with a compass

Explanation / Answer

a. Harnness (On Moho scale, more than 7) : Sand, pumice, diamond

b. Transparency: Mica sheets

c. Transparency: Glass

d. Softness: Graphite

e. Lubricative: Oil, graphite powder

f: Water absorbent: Talc

g. Glittery, shiny: Mica

h. Selective reflection and absorbtion of visible light: mercury sulfide, Cadmium sulfide

i: Magnetism: Magnetite

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