http://geology.com/rocks/
This website had pictures of lots of pictures of igneous rocks, it was titled as Rocks: Igneous, Metamorphic and Sedimentary
Five uses of five different igneous rock:
Granite: Counter tops, landscaping, sculptures, fill, wall tile
Gabbro: paving stone, tile in kitchens, countertops , graveyard headstones, ornamental facing stones
Obsidian: sergical tools, arrow heads, spears, knives, jewerly
Basalt: railroads, highway construction, asphalt, aggregate, filter stone in drains
Pumice: dental abrasive, abrasive hand soap ingredient, polish ingredient, cosmedic skin abrasive, soil conditioner
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