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试金石是指一种可用来鉴别黄金的石块。古代对黄金的真伪和成色的鉴定是靠在试金石上划痕来鉴别的。这是一种古老的方法,希腊人在公元前六世纪的著作中就记述了试金石的应用。有人认
Touchstone is a stone that can be used to identify gold. The ancient authenticity of gold and the fineness of the identification is based on scratches on the touchstone to identify. This is an ancient method. The Greeks described the use of touchstone in the writings of the 6th century BC. Some people think