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Obsidian scalpels older than 2100 BC have been found in a Bronze Age settlement in Turkey. [48] In the eastern Mediterranean area the material was used to make tools, mirrors and decorative objects. [49] The use of obsidian tools was present in Japan near areas of volcanic activity. [50] [51] Obsidian was mined during the Jōmon period.
Obsidian Publish is a web hosting service that allows subscribers to publish their Obsidian vaults onto the internet. Vaults that are published with the service are typically formatted similarly to the application, with a graph view provided for links between pages. The service provides support for using custom domains, themes and analytics ...
Maya mirrors and their use are depicted on Classic Maya polychrome ceramics, where pictorial vases frequently depict scenes from courtly life. [23] One vase depicts an anthropomorphic dog staring into the depths of a vase, behind the vase an anthropomorphic monkey dances while staring into a mirror held up in one hand. [ 63 ]
Helenite, also known as Mount St. Helens obsidian, emerald obsidianite, and ruby obsidianite, is a glass made from the fused volcanic rock dust from Mount St. Helens and marketed as a gemstone. [ 1 ] [ 2 ] Helenite was first created accidentally after the eruption of Mount St. Helens in 1980 .
Most commonly, volcanic glass refers to obsidian, a rhyolitic glass with high silica (SiO 2) content. [7] Other types of volcanic glass include the following: Pumice, which is considered a glass because it has no crystal structure. Apache tears, a kind of nodular obsidian.
The latest issue of Hello! magazine describes Melania Trump as someone who has "grown in confidence" and now has "newfound authority" during her second stint in the White House as first lady.
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Despite being sharper, prismatic obsidian is also considerably more brittle than steel; obsidian blades of the type used on the macuahuitl tended to shatter on impact with other obsidian blades, steel swords or plate armour. Obsidian blades also have difficulty penetrating European mail. The thin, replaceable blades used on the macuahuitl were ...