WebJul 1, 2024 · Though it’s not exactly obsidian, it is perlite with spherulites in it. The spherulites are radiating crystals of feldspar, tinted by hematite. They are quite chatoyant … Webany of several spherical masses of radiating needle-like crystals of one or more minerals occurring in rocks such as obsidian Derived forms of spherulite spherulitic ( ˌsfɛrʊˈlɪtɪk ), …
Spherulite Definition & Meaning - Merriam-Webster
Spherulites are most common in silica-rich glassy rocks. Sometimes they compose the whole mass; more usually they are surrounded by a glassy or felsitic base. When obsidians are devitrified, the spherulites are often traceable, though they may be more or less completely recrystallized or silicified. In the center of a … See more In petrology, spherulites are small, rounded bodies that commonly occur in vitreous igneous rocks. They are often visible in specimens of obsidian, pitchstone, and rhyolite as globules about the size of millet seed or rice grain, … See more Under the microscope the spherulites are of circular outline and are composed of thin divergent fibers that are crystalline as verified with polarized light. Between crossed See more Very large and cavernous spherulites are called lithophysae; they are found in obsidians at Lipari, in Yellowstone Park and other places. The … See more Variolites are a type of radiate fibrous growth, resembling spherulites in many respects, consisting of minute feathery crystals spreading … See more Occasionally spherulites are found that are many centimeters and, even more rarely, up to two or three meters in diameter. Those spherulites, which are more than 20 centimeters in diameter, are called megaspherulites. Near Silver Cliff, Colorado, … See more Artificial glass sometimes crystallizes and contains spherulites that may be as large as a marble. As the glass has little similarity in chemical composition to volcanic obsidians, … See more WebDec 14, 2024 · Obsidian Therapeutics to Present Preclinical Data from cytoDRiVE® Platform and Pipeline at Society for Immunotherapy of Cancer (SITC) Annual Meeting 2024. … hercules bakery
Spherulite Aspect In The Obsidian Lava Flow From …
WebJun 22, 2009 · SPHERULITES. The next order of crystallization in the obsidian is the spherulitic. The simplest and smallest as well as the first formed spherulites appear as … WebJul 25, 2008 · Spherulites are polycrystalline solids that develop under highly non-equilibrium conditions in liquids (Keith and Padden 1963). Natural spherulites are … WebJun 22, 2009 · Very beautiful, black obsidian, with small lithophysæ and occasional spherulites, occurs at Obsidian Hill and on the Rio San Diego and in other localities in the … hercules baking supplies