Rocks and Minerals Question Marathon

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Re: Rocks and Minerals Question Marathon

Post by Pleistocene » February 14th, 2013, 3:31 pm

[img]http://www.mindat.org/photos/0597299001036022053.jpg[/img][img]http://www.mindat.org/photos/0215712001221853321.jpg[/img]two common uses of the both of them
Last edited by Pleistocene on February 14th, 2013, 6:40 pm, edited 2 times in total.

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Re: Rocks and Minerals Question Marathon

Post by Pleistocene » February 14th, 2013, 6:36 pm

Do we have to hide pictures :?:

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Re: Rocks and Minerals Question Marathon

Post by inluvwyth_WANTED » February 14th, 2013, 7:27 pm

it sorta just saves space?
Diamond: gemstone, abrasives, used for coating surfaces of metal tips, drills, etc
Magnetite(?): ore of iron, abrasive, used for its ferromagnetism, pigments

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Re: Rocks and Minerals Question Marathon

Post by Pleistocene » February 14th, 2013, 7:38 pm

[quote="inluvwyth_WANTED"]it sorta just saves space?
Diamond: gemstone, abrasives, used for coating surfaces of metal tips, drills, etc
Magnetite(?): ore of iron, abrasive, used for its ferromagnetism, pigments
[/quote
You got the first one, but not the second one
Keep guessing :lol:

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Re: Rocks and Minerals Question Marathon

Post by zimmy1235 » February 14th, 2013, 8:37 pm

Sphalerite; main ore of zinc, also used as a gemstone occasionally

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Re: Rocks and Minerals Question Marathon

Post by Pleistocene » February 14th, 2013, 8:43 pm

Since you both got one correct you two find a way to see who's turn it is

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Re: Rocks and Minerals Question Marathon

Post by inluvwyth_WANTED » February 14th, 2013, 9:27 pm

You can go, zimmy1235

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Re: Rocks and Minerals Question Marathon

Post by zimmy1235 » February 15th, 2013, 8:50 am

[img]https://www2.imperial.ac.uk/earthscienceandengineering/rocklibrary/shared/hs_2502_1.JPG[/img] [img]http://www.dinojim.com/Geology/GeoBasics/Images/Sedimentary/Chalk.JPG[/img]

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Re: Rocks and Minerals Question Marathon

Post by Pleistocene » February 15th, 2013, 3:06 pm

chert and chalk chalk is form when died protozoan pile up on the sea floor since of the calcite in there shells over year that are compacted and form chalk chert is formed when microcrystal of silicon dioxide grows in soft sedimets

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Re: Rocks and Minerals Question Marathon

Post by zimmy1235 » February 16th, 2013, 9:50 am

Correct, your turn Pleistocene

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