Introduction. During the Cuban Missile Crisis, leaders of the U.S. and the Soviet Union engaged in a tense, 13-day political and military standoff in October 1962 over the installation of nuclear-armed Soviet missiles on Cuba, just 90 miles from U.S. shores.
Base Metal. Base metal is a jewelry industry term for nonprecious metals used in costume jewelry, including copper, aluminum, brass, nickel silver, pewter and white metal, also called pot metal. Nickel silver is a silvery-white alloy resembling silver made from nickel, zinc, copper, iron, manganese and sometimes lead.nlike fine jewelry, costume jewelry is made from nonprecious metals called base metals. Most of these are both beautiful and relatively benign. However, nickel can cause an allergic reaction, while the lead found in some alloys has been linked to far more serious conditions and is highly regulated.
Confidence votes 1.1K. 925 usually means its sterling silver, custume jewelry is usually made of a base metal. The value of costume jewelry is based on condition, manufacturer, and detail/fashion and age. No some costume jewelry is valuable depending on the things mentioned above.terling silver is said to have a fineness of 925, which is the number of parts per thousand of pure metal by weight. Pure silver has a fineness of 999. You should not see 925 on any gold jewelry, instead it should have the karats listed.