Synonymer & Anagrammer | engelsk ord OBSIDIAN

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Eksempler på brug af OBSIDIAN i en sætning

• Certain rocks (such as lapis lazuli, opal, and obsidian) and occasionally organic materials that are not minerals (such as amber, jet, and pearl) may also be used for jewelry and are therefore often considered to be gemstones as well.
• Originally made of wood, bone, and stone (such as flint and obsidian), over the centuries, in step with improvements in both metallurgy and manufacturing, knife blades have been made from copper, bronze, iron, steel, ceramic, and titanium.
• Mineraloid substances possess chemical compositions that vary beyond the generally accepted ranges for specific minerals, for example, obsidian is an amorphous glass and not a true crystal; lignite (jet) is derived from the decay of wood under extreme pressure underground; and opal is a mineraloid substance because of its non-crystalline nature.
• Obsidian is produced from felsic lava, rich in the lighter elements such as silicon, oxygen, aluminum, sodium, and potassium.
• The head may be simply the sharpened end of the shaft itself, as is the case with fire hardened spears, or it may be made of a more durable material fastened to the shaft, such as bone, flint, obsidian, copper, bronze, iron, or steel.
• Volcanic rocks, especially of the felsic type such as felsites and rhyolites, may have a cryptocrystalline groundmass as distinguished from pure obsidian (felsic) or tachylyte (mafic), which are natural rock glasses.
• The history of glassware dates back to the Phoenicians who fused obsidian together in campfires making the first glassware.
• Perlite is an amorphous volcanic glass that has a relatively high water content, typically formed by the hydration of obsidian.
• The Eritrean Research Project Team composed of Eritrean, Canadian, American, Dutch and French scientists discovered a Paleolithic site with stone and obsidian tools dated to over 125,000 years old south of Massawa, along the Red Sea littoral.
• He shoots Tonatiuh with atlatl darts, but misses and is hit by Tonatiuh's darts, being transformed into the god of obsidian and coldness, Itztlacoliuhqui.
• Ixtlilton was a gentle god, who emanated from an obsidian mask which brought darkness and peaceful sleep to children in their beds at night.
• The earliest evidence of warfare between two groups is recorded at the site of Nataruk in Turkana, Kenya, where human skeletons with major traumatic injuries to the head, neck, ribs, knees and hands, including an embedded obsidian bladelet on a skull, are evidence of inter-group conflict between groups of nomadic hunter-gatherers 10,000 years ago.
• Hine-nui-te-po reacted by crushing him with the obsidian teeth in her vagina; Māui was the first man to die.
• Cryptocrystalline tool stones include flint and chert, which are fine-grained sedimentary materials; rhyolite and felsite, which are igneous flowstones; and obsidian, a form of natural glass created by igneous processes.
• The most famous and most prevalent prismatic blade material is obsidian, as obsidian use was widespread in Mesoamerica, though chert, flint, and chalcedony blades are not uncommon.
• Knapping is the shaping of flint, chert, obsidian, or other conchoidal fracturing stone through the process of lithic reduction to manufacture stone tools, strikers for flintlock firearms, or to produce flat-faced stones for building or facing walls, and flushwork decoration.
• Natural glass from Milos was transported over long distances and used for razor-sharp "stone tools" well before farming began and later: "There is no early farming village in the Near East that doesn't get obsidian".
• Bentonite usually forms from the weathering of volcanic ash in seawater, or by hydrothermal circulation through the porosity of volcanic ash beds, which converts (devitrification) the volcanic glass (obsidian, rhyolite, dacite) present in the ash into clay minerals.
• Scalpel blades are usually made of hardened and tempered steel, stainless steel, or high carbon steel; in addition, titanium, ceramic, diamond and even obsidian knives are not uncommon.
• Onyx, as a descriptive term, has also been applied to parallel-banded varieties of alabaster, marble, calcite, obsidian, and opal, and misleadingly to materials with contorted banding, such as "cave onyx" and "Mexican onyx".

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