• Amphibole - Wikipedia

    en.wikipedia.org/wiki/Amphibole Amphibole (/ ˈ æ m f ɪ b oʊ l /) is a group of inosilicate minerals, forming prism or needlelike crystals, composed of double chain SiO 4 tetrahedra, linked at the vertices and generally containing ions of iron and/or magnesium in their structures. Amphiboles can be green, black, colorless, white, yellow, blue, or brown. The International Mineralogical Association currently classifies ...
  • Amphibole | mineral | Britannica

    www.britannica.com/science/amphibole Amphibole, any of a group of common rock-forming silicate minerals. Amphiboles are found principally in metamorphic and igneous rocks. They occur in many metamorphic rocks, especially those derived from mafic igneous rocks (those containing dark-coloured ferromagnesian minerals) and siliceous
  • Amphibole | Definition of Amphibole by Merriam-Webster

    www.merriam-webster.com/dictionary/amphibole Amphibole definition is - hornblende. 2: any of a group of complex silicate minerals with like crystal structures that contain calcium, sodium, magnesium, aluminum, or iron ions or a combination of them
  • University of Minnesota’s Mineral Pages: Amphibole

    www.esci.umn.edu/courses/1001/minerals/amphibole.shtml Amphibole is a common component of plutonic and metamorphic rocks across the region, but there are no notable local occurrences of collectable grade amphibole mineral crystals. The Morton Gneiss of central Minnesota is probably the most famous amphibole-bearing regional rock. The dark bands in this rock are primarily composed of amphibole and ...
  • Amphibole Group Minerals | Physical - Optical Properties ...

    geologyscience.com/minerals/amphibole Amphibole is an crucial institution of usually darkish-colored, inosilicate minerals, forming prism or needlelike crystals,composed of double chain SiO4 tetrahedra, connected at the vertices and normally containing ions of iron and/or magnesium in their systems. Amphiboles may be inexperienced, black, colorless, white, yellow, blue, or brown.
  • Amphibolite | rock | Britannica

    www.britannica.com/science/amphibolite Amphibolite, a rock composed largely or dominantly of minerals of the amphibole group. The term has been applied to rocks of either igneous or metamorphic origin. In igneous rocks, the term hornblendite is more common and restrictive; hornblende is the most common amphibole and is typical of such rocks. Hornblendite is an ultramafic rock (dominantly dark minerals).
  • Amphibolite - Wikipedia

    en.wikipedia.org/wiki/Amphibolite Amphibolite (/ æ m ˈ f ɪ b ə l aɪ t /) is a metamorphic rock that contains amphibole, especially hornblende and actinolite, as well as plagioclase.. Amphibolite is a grouping of rocks composed mainly of amphibole and plagioclase feldspar, with little or no quartz.It is typically dark-colored and dense, with a weakly foliated or schistose (flaky) structure. The small flakes of black and ...
  • Amphibolite: Metamorphic Rock - Pictures, Definition & More

    geology.com/rocks/amphibolite.shtml Amphibolite: Amphibolite is a coarse-grained metamorphic rock that has amphibole minerals such as the hornblende group as its primary ingredient. The specimen shown is about two inches (five centimeters) across.
  • Amphibole Quartz: Meanings, Properties and Powers - A ...

    meanings.crystalsandjewelry.com/amphibole-quartz Amphibole Quartz is a type of quartz that is only found in Brazil, making it a relatively rare crystal.. It is named after the group of minerals, “Amphibole” that make a part of this category of quartz stones. Amphibole Quartz is usually very lightly colored and can sometimes even be colorless.
  • Amphibole - 6 answers | Crossword Clues

    www.crosswordclues.com/clue/amphibole • Amphibole l is the name of an important group of generally dark-colored • An important rockforming mineral group of ferromagnesian silicates • Group of generally dark-colored rock-forming inosilicate minerals • Hornblende amphibole Credit: USGS Any of a large group of rock-forming