Video shows what cryptocrystalline means. Whose crystalline nature only becomes apparent at high levels of magnification.. Cryptocrystalline Meaning. How to pronounce, definition audio dictionary. How to say cryptocrystalline. Powered by MaryTTS, Wiktionary
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What does cryptocrystalline mean? A spoken definition of cryptocrystalline. Intro Sound: Typewriter - Tamskp Licensed under CC:BA 3.0 Outro Music: Groove Groove - Kevin MacLeod (incompetech.com) Licensed under CC:BA 3.0 Intro/Outro Photo: The best days are not planned - Marcus Hansson Licensed under CC-BY-2.0 Book Image: Open Book template PSD - DougitDesign Licensed under CC:BA 3.0 Text derived from: http://en.wiktionary.org/wiki/cryptocrystalline
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What is FLAKE TOOL? What does FLAKE TOOL mean? FLAKE TOOL meaning - FLAKE TOOL definition - FLAKE TOOL explanation. Source: Wikipedia.org article, adapted under https://creativecommons.org/licenses/by-sa/3.0/ license. SUBSCRIBE to our Google Earth flights channel - https://www.youtube.com/channel/UC6UuCPh7GrXznZi0Hz2YQnQ In archaeology, a flake tool is a type of stone tool that was used during the Stone Age that was created by striking a flake from a prepared stone core. People during prehistoric times often preferred these flake tools as compared to other tools because these tools were often easily made, could be made to be extremely sharp and could easily be repaired. Flake tools could be sharpened by retouch to create scrapers or burins. These tools were either made by flaking off small particles of flint or by breaking off a large piece and using that as a tool itself. These tools were able to be made by this "chipping" away effect due to the natural characteristic of stone. Stone is able to break apart when struck near the edge. Flake tools are created through flint knapping, a process of producing stone tools using lithic reduction. Lithic reduction is the removal of a lithic flake from a larger stone in order to reach the desired tool shape and size. The beginning stone is called the flake lithic core. There are three steps to lithic reduction: 1. Hard hammer percussion is the first step. It involves knocking off the larger flakes to achieve the desired lithic core for the flake tool. In using hard hammer percussion the flake tools were made by taking metamorphic or igneous rock such as granite or quartz and striking it against the stone. This method was often used to flake large core flakes of hard rock. 2. Soft hammer percussion is the second step. It involves using a hammer made of bone, which was often antler, in order to knock off flakes from the lithic core. Animal antlers such as moose, deer and elk were often the most common ones used. It allows the user more control over the size and shape of the flakes knocked off. Soft hammer percussion was also used when the stone was more brittle. 3. Pressure flaking is the final step. It involves using a piece of bone, antler, or piece of hardwood in order to have more control of the flakes knocked off of the lithic core. One simply applies outward and downward pressure to achieve the final flake tool. Certain types of stone work better for creating flake tools than others. There are two important characteristics when it comes to creating flake tools, cryptocrystalline and conchoidal fracture. Cryptocrystalline relates to a stone structure that is made up of such minute crystals that its crystalline structure is only vaguely revealed. These cryptocrystalline rocks are composed of microscopic crystal like patterns. Since these rocks are not composed of large quartz crystals, they often break as easily as glass and then make conchoidal fractures. Conchoidal fracture describes the way in which materials break when they do not follow the natural planes of separation. These fractures are described as curved. When the stone is struck the blow from the strike it distributed onto the rock in an even fashion, giving the fracture a radial appearance. The production of these lithic tools is only made possible due to their ability to fracture in this way. Examples of such materials include fine-grained materials, such as carbonado, volcanic rocks, obsidian, onyx, and types of glass. These would all be excellent materials for creating flake tools. Flake tools can teach us much about human history. Residue analysis can be done to learn what was processed by the flake tools. Use-wear analysis can give archaeologists an idea of what the flake tool was used for. Archaeologists also use a process called re-fitting. This is the technological process of putting rock shards back together in their original shape in order to get a good idea of how the tool was created. All of the process can help us to understand our human ancestors and how, why and when they created flake tools. These flake tools also have characteristics that show that these tools were made as a result of human work instead of natural processes. Each flake has 5 different parts: the first of which is a bulb of percussion which can also be known as the bulb of force. The next being an eraillure which is a flake that has been taken off of the lithic bulb of percussion. The third part of the flake is the radial fissures. The next part of the flake is the ripple marks followed by the negative flake scars which are located on the dorsal side from earlier flake markings.
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Learn with the Butler how to pronounce every word in this world. Check what else you can find on ▸▸ http://www.thebutlersays.com ◂◂ This is the definition of "Chalcedony": n. A cryptocrystalline, translucent variety of quartz, having usually a whitish color, and a luster nearly like wax. ******************** Subscribe to our channel!! ▸▸ https://www.youtube.com/channel/UC7H4hBq21xUq8CerH8aLC1w ◂◂ ******************** Make sure to follow us also here and here and here! Facebook ▸▸ https://www.facebook.com/The-Butler-Says-1072374846148212 ◂◂ Twitter ▸▸ https://twitter.com/TheButlerSays_ ◂◂ Google+ ▸▸ https://plus.google.com/u/0/113453810262607267814 ◂◂ ******************** If you like this videos, please consider donating Bitcoins to 1L2ZNnYmVj8fhUX5xitdbdUF5GQkSCQkPw ********************
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Learn how to pronounce Chalcedony This is the *English* pronunciation of the word Chalcedony. According to Wikipedia, this is one of the possible definitions of the word "Chalcedony": Chalcedony /kælˈsɛdəni/ is a cryptocrystalline form of silica, composed of very fine intergrowths of the minerals quartz and moganite. These are both silica minerals, but they differ in that quartz has a trigonal crystal structure, while moganite is monoclinic. Chalcedony's standard chemical structure (based on the chemical structure of quartz) is SiO2 (silicon dioxide). Chalcedony has a waxy luster, and may be semitransparent or translucent. It can assume a wide range of colors, but those most commonly seen are white to gray, grayish-blue or a shade of brown ranging from pale to nearly black. The name chalcedony comes from the Latin chalcedonius (alternatively spelled calchedonius). The name appears in Pliny the Elder's Naturalis Historia as a term for a translucid kind of Jaspis. The name is probably derived from the town Chalcedon in Asia Minor. The Greek word khalkedon (χαλκηδών) also appears in the Book of Revelation (Apc 21,19). It is a hapax legomenon, a word found nowhere else, so it is impossible to tell whether the precious gem mentioned in the Bible is the same mineral known by this name today. PronunciationAcademy is the world's biggest and most accurate source for word pronunciations, SUBSCRIBE here: https://www.youtube.com/channel/UCnImcI-VA0N1aGSx677QCYA/feed Twitter: https://twitter.com/PronunciationA Website: http://www.pronunciationacademy.com
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What does onyx mean? A spoken definition of onyx. Intro Sound: Typewriter - Tamskp Licensed under CC:BA 3.0 Outro Music: Groove Groove - Kevin MacLeod (incompetech.com) Licensed under CC:BA 3.0 Intro/Outro Photo: The best days are not planned - Marcus Hansson Licensed under CC-BY-2.0 Book Image: Open Book template PSD - DougitDesign Licensed under CC:BA 3.0 Text derived from: http://en.wiktionary.org/wiki/onyx Text to Speech powered by TTS-API.COM
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