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.
[ProductDetailsESpot_Tab1] AMC YELLOW Tickets WILL NOT be accepted in California, New York and New Jersey. If redeeming in California, New York of New Jersey Purchase Item #1111130 AMC Black Tickets. When you purchase your AMC Yellow eTickets, Four (4) eTickets will be emailed to you normally within an hour. Please make sure that you double-check your email address when you place your order.