New York , NY
Glowing Lime Limelight
Photograph - Photograph
A sample of marble (having previously been converted to lime in a kiln) glows after being heated. Lime is produced by heating calcium carbonate until the extra carbon and oxygen atoms are driven off leaving just the calcium oxide, or quicklime, which is used to make limelight (a historic type of stage lighting and source of the phrase "in the limelight"). Lime can be made from sea shells, chalk, and many types of rock, including marble.
June 2nd, 2013
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