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Kheu Bloom. Talc Talc has the hardness scale of one and is the softest mineral. Uses Talc uses include: paint, ceramics, rubber, roofing, paper. Color.

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Presentation on theme: "Kheu Bloom. Talc Talc has the hardness scale of one and is the softest mineral. Uses Talc uses include: paint, ceramics, rubber, roofing, paper. Color."— Presentation transcript:

1 Kheu Bloom

2 Talc Talc has the hardness scale of one and is the softest mineral. Uses Talc uses include: paint, ceramics, rubber, roofing, paper. Color sea green, white, gray Streak white to very pale green Luster pearly Cleavage perfect

3 Gypsum Gypsum uses include: manufacture of wallboard, cement, plaster of Paris, soil conditioning, a hardening retarder in Portland cement. Varieties of gypsum known as "satin spar" and "alabaster" are used for a variety of ornamental purposes, however their low hardness limits their durability. Color clear, colorless, white, gray, yellow, red, brown Streak white Luster vitreous Cleavage perfect Hardness 2

4 Calcite Calcite has more uses than almost any other mineral. Most is used as a construction material in the form of cement, concrete, dimension stone or aggregate. In agriculture it is used as a soil treatment to neutralize acids and as a filler or dietary supplement in livestock feeds. It is used in many medications, particularly those that treat excess stomach acids. Several other uses are described in the article at the top of this page. Color usually white but also colorless, gray, red, green, blue, yellow, brown, orange Streak white Luster vitreous Cleavage perfect, rhombus shaped Hardness 3

5 Fluorite Fluorite uses include: flux, drinking water, ornamental stone. Color colorless, green, blue, purple, yellow, red, black Streak white Luster vitreous Cleavage perfect, octahedral Hardness 4

6 Apatite Uses The primary use of apatite is in the manufacture of fertilizer - it is a source of phosphorus. It is occasionally used as a gemstone. Apatite also serves as an index mineral of Mohs hardness scale with a hardness of five. Color green, brown, blue, yellow, violet, colorless Streak white Luster vitreous to subresinous Cleavage poor Hardness 5

7 Orthoclase Orthoclase uses include: gemstones. Color white, gray, flesh pink, reddish, yellow, green Streak white Luster vitreous Diaphaneity translucent to sub translucent Cleavage perfect Hardness

8 Quartz Quartz uses: glass making, foundry sand, hydrofrac sand, optical materials, components in electronic products, traction sands, sharpening media, polishing compounds, grinding compounds, fillers and extenders. Color Quartz occurs in virtually every color. Common colors are clear, white, gray, purple, yellow, brown, black, pink, green, red. Streak colorless (harder than the streak plate) Luster vitreous Cleavage none - typically breaks with a break fracture. Hardness 7

9 Topaz Uses The only significant commercial use of topaz is as a gemstone. It also serves as the Mohs Hardness Scale standard for a hardness of eight. Color Colorless, white, yellow, amber, pink, blue, green, gray Streak Colorless - harder than the streak plate Luster Normally vitreous Cleavage Perfect basal cleavage Hardness 8

10 Corundum Uses Corundum is very hard and is used as an abrasive in the manufacture of sandpaper, polishing compounds and cutting tools. When it occurs as a colorful and clear stone it is used as gem. Rubies are red corundums and corundums of any other color are known as sapphires. Color Most often gray, but also white, brown, red, blue, yellow, green. Streak Corundum is harder than the streak plate. It does not leave a streak. Luster Adamantine to vitreous. Cleavage None. However, corundum does display parting perpendicular to the long axis of its hexagonal crystals (see photo below). Hardness 9

11 Diamonds Uses of Diamond Most of the world's diamond production is consumed by industry for use as an abrasive in cutting, grinding, drilling and polishing procedures. The second category of diamond use is as a gemstone. More money is spent on diamonds than all other types of gemstones combined. A small amount of diamond goes to other use. These include: heat sinks, specialty windows and bearings. Color Most industrial grade diamond is black in color, often due to impurities. Gem quality diamonds occur in a range of colors. These include: colorless, yellow, red, orange, green, blue, and brown. Streak colorless - diamond is much harder than the streak plate Luster adamantine - the highest luster for a nonmetallic mineral Cleavage perfect, octahedral Hardness 10


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