Gemstone Hardness. The Mohs scale of mineral hardness was created by German mineralogist, Friedrich Mohs, in 1822 to measure the relative hardness or scratch resistance of various minerals. He based it on ten readily available minerals. As it is an ordinal scale, two minerals must be compared to decide which is harder. The scale is neither linear nor logarithmic.
AMC Black tickets are exchange items that are NOT eligible toward earning AMC Stubs rewards either at time of purchase or time of redemption. Valid seven days a week. Yellow Ticket Terms and Conditions. Not Valid in: CALIFORNIA, NEW YORK, and NEW JERSEY Present at box office only.
AMC is an American basic cable and satellite television channel that is owned by AMC Networks. The channel primarily airs theatrically released movies, along with a limited amount of original programming. The channel's name originally stood for American Movie Classics, but since 2002 the full name has been deemphasized as a result of a major shift in its programming. As of August 2013, AMC is received by approximately 97,699,000 American households that subscribe to a pay television service.