Chemicool
Chemicool: Gold
Chemicool.com offers a quick look at the element gold. Includes natural abundance data and approximate cost.
Other
Mrs. Gottrocks: Gold and Precious Metals Information
Explains the karat system of expressing the purity of gold.
Curated OER
Educational Technology Clearinghouse: Clip Art Etc: Aurum
Gold appears not to have been coined at Athens till the time of the Macedonian empire, with the exception a solitary issue of a debased coinage in 407. But from a very early period the Asian nations, and he Greek cities of Asia Minor and...