Obsidian ( / əbˈsɪdi.ən, ɒb -/) [5] is a naturally occurring volcanic glass formed when lava extruded from a volcano cools rapidly with minimal crystal growth. It is an igneous rock. [6] Obsidian is produced from felsic lava, rich in the lighter elements such as silicon, oxygen, aluminium, sodium, and potassium. Obsidian is defined as having a density of about .98 grams per cubic centimeter, which is very close to the average for most types of rocks and minerals. When compared with other naturally occurring stones like granite, which is an igneous rock, obsidian is much heavier. Granite can weigh anywhere from .77 to about two grams per cubic centimeter.
Obsidian Value, Price, and Jewelry Information International Gem Society
If you're comparing obsidian to onyx (2 that are quite often confused), obsidian will be the lighter weight of the two because it's less dense than onyx (due to the lack of crystalline structure and interior air bubbles) and can even be translucent in spots if you hold it up to the light…s omething really hard to capture in a photo for me…but I tried in the below photo. One of the ways I use Obsidian is as a very lightweight personal CRM to keep track of people I meet, meetings I have, etc. For most of my time using Obsidian I organized meetings into their own notes. I'd name them "YYYY-MM-DD meeting with John Smith" or whatever, add [[John Smith]] and #meeting and then drop the linked note into the daily note. Here's my short answer: • Plaintext, standard markdown, .md files • Customizable; I can shape it to my needs, preferences, and tastes, even without knowing how to write code • Versatile; I can write in standard paragraphs and in outlines as needed, from atomic notes to longform • Large, friendly, supportive community Obsidian generally contains less than 1 percent water by weight. Under high pressure at depth, rhyolitic lavas may contain up to 10 percent water, which helps to keep them fluid even at a low temperature. Eruption to the surface, where pressure is low, permits rapid escape of this volatile water and increases the viscosity of the melt.
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( ʘ дʘ) [SU][gemsona] 創角,自己畫開心的 Obsidian 黑曜石 Plurk
Andesite is an extrusive igneous rock that is higher in silica than basalt and lower than rhyolite or felsite. Click the photo to see the full-size version. In general, color is a good clue to the silica content of extrusive igneous rocks, with basalt being dark and felsite being light. November 18, 2022 (Credit: Obsidian) The Bottom Line With rich customization options, plug-ins galore, and the ability to connect notes in a network-like structure, Obsidian is a note-taking. Nov 19, 2022 4.0 Excellent Bottom Line With rich customization options, plug-ins galore, and the ability to connect notes in a network-like structure, Obsidian is a note-taking app best suited. This lightweight, translucent crystal was named after its discoverer, the Roman explorer Obsius who came across Obsidian in Ethiopia. Obsidian is a smooth, glossy crystal however you may also find it to be brittle and have sharp edges. it rates as a 5-6 on the Mohs hardness scale which makes it weaker than Quartz which is a 7, however it is.
Obsidian Stone History, Meanings, Properties, Uses & More Gem Rock
The application feels very responsive and relatively lightweight. The places where your files are stored are very transparent. The search is very fast and pretty powerful. I personally like that there are two modes, one for editing and one for viewing. The command palette is well-implemented. It is very extensible. Obsidian is an igneous rock that forms when molten rock material cools so rapidly that atoms are unable to arrange themselves into a crystalline structure. It is an amorphous material known as a " mineraloid ." The result is a volcanic glass with a smooth uniform texture that breaks with a conchoidal fracture (see photo). Where Does Obsidian Form?
Portions of this obsidian flow are mixed with layers of pumice, a glassy, bubble-rich, lightweight rock that develops when water vapor (steam) escapes rapidly from the molten glass at or near the ground surface. Sometimes obsidian of excellent quality develops as surface lava flows. Obsidian adopts the powerful and lightweight Markdown syntax for formatting your notes. This allows you to focus on your thoughts without getting distracted by complex formatting options. Interlinking. Obsidian's unique strength lies in its ability to create bi-directional links between notes. By simply mentioning the title of another note.
9 Best Places Where Obsidian Can Be Found In The United States Rock
Obsidian, a volcanic glass, usually of rhyolitic composition, forms by rapid cooling of a viscous lava. Most obsidians are more than 70 percent silica and are low in volatile contents. Microscopic crystals of quartz or feldspar are sometimes included in the glass. Obsidian occurs as thick, short flows or domes over volcanic vents. Obsidian is an extreme variety of igneous rock with a glassy texture. Most popular accounts say that obsidian forms when lava cools very quickly, but that is not quite accurate. Obsidian starts with lava very high in silica (more than about 70 percent), such as rhyolite. The many strong chemical bonds between silicon and oxygen make such lava.
