单词	obsidian
释义	obsidianob‧sid‧i‧an /əbˈsɪdiən/ noun [uncountable] Word Origin WORD ORIGINobsidian Origin: 1300-1400 Latin obsidianus lapis, mistake for obsianus lapis ‘stone of Obsius’, a Roman traveler said to have discovered the rock Examples EXAMPLES FROM THE CORPUS A glass tide tinkled on the hull of the receiver, its echoing obsidian. A glassy stone beloved by ancient toolmakers, obsidian was found only in two prehistoric spots in Arizona prior to the 1980s. A plain black obsidian which the Minoan craftsmen tried may have come from the Siftlik area of Cappadocia. For example, many early human artifacts, such as arrowheads, are made of obsidian, a volcanic glass. I had a friend send me some obsidian blades. Pre-Columbian cultures in the New World did sophisticated operations, including skull surgery, with obsidian, he added. Unlike most volcanic rocks, obsidian does not contain phenocrysts; it is, so to speak, all glassy groundmass. Walls, ceilings, floors were clad in smooth obsidian and jet carved with runes, sacred hexes and texts. a type of rock that looks like black glass
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