Acid Test (gold)
An acid test is any qualitative chemical or metallurgical assay which uses acid; most commonly, and historically, the use of a strong acid to distinguish gold from base metals. Figuratively, acid test is any definitive test for some attribute, e.g. of a person's character, or of the performance of some product.
Read more about Acid Test (gold): Chemistry, Figurative Meanings
Famous quotes containing the word test:
“The test of a first-rate intelligence is the ability to hold two opposed ideas in the mind at the same time, and still retain the ability to function.”
—F. Scott Fitzgerald (1896–1940)