Amphibole (/ˈæmfəboʊl/ AM-fə-bohl) is a group of inosilicate minerals, forming prism or needlelike crystals, composed of double chain SiO 4 tetrahedra...

in the amphibole group was banned in much of the Western world by the mid-1980s, and in Japan by 1995. Some products that included amphibole types of...

appearance from the parallel intergrowth of quartz crystals and altered amphibole fibres that have mostly turned into limonite. Tiger iron is an altered...

quartz and alkali feldspar. Most granitic rocks also contain mica or amphibole minerals, though a few (known as leucogranites) contain almost no dark...

Cummingtonite (/ˈkʌmɪŋtənaɪt/ KUM-ing-tə-nyte) is a metamorphic amphibole with the chemical composition (Mg,Fe2+ ) 2(Mg,Fe2+ ) 5Si 8O 22(OH) 2, magnesium...

Amphibolite (/æmˈfɪbəlaɪt/) is a metamorphic rock that contains amphibole, especially hornblende and actinolite, as well as plagioclase feldspar, but...

silicate mineral names: nephrite (a silicate of calcium and magnesium in the amphibole group of minerals), or jadeite (a silicate of sodium and aluminum in the...

but the name is used as a general or field term, to refer to a dark amphibole. Hornblende minerals are common in igneous and metamorphic rocks. The...

species of amphibole, although variations, as in the pyroxenes, most commonly involve mixtures of Ca2+, Fe2+ and Mg2+. Several amphibole mineral species...

southern edge of the range. To the north of these are Ropebreak Pass, Amphibole Peak, Mount Baker, Polaris Peak, Mount Roth. Mount Justman and Olliver...

Riebeckite is a sodium-rich member of the amphibole group of silicate minerals, chemical formula Na2(Fe2+3Fe3+2)Si8O22(OH)2. It forms a solid solution...

Alunogen Amakinite Amarantite Amblygonite Ameghinite Amesite Amicite Amphibole (mineral group) Analcime (analcite) Anandite Anapaite Anatase Ancylite...

structure and composed of chemically similar elements. For example, the amphibole group consists of 15 or more mineral species, most of them with the general...

common minerals include quartz, orthoclase, talc, carbonate minerals and amphibole (actinolite). Greenschist is a general field petrologic term for metamorphic...

phlogopite (2 wt% H2O) and amphibole (2 wt% H2O). Phlogopite does not release water until approximately 200 km depth whereas amphibole releases water at approximately...

t e Minerals Overview Mineral List Mineralogy History Common minerals Amphibole Bridgmanite K-feldspar Mica Olivine Plagioclase Pyroxene Quartz Spinel...

iron and magnesium tends to manifest as a darker groundmass, including amphibole or pyroxene phenocrysts. Mafic or basaltic magmas have a silica content...

Basalt Igneous rock Composition Primary Mafic: plagioclase, amphibole, and pyroxene Secondary Sometimes feldspathoids or olivine...

resorption shape. The reaction rim constituted by amphibole and/or biotite is commonly observed. The amphibole is of high alkali, such as alkaline hornblende...

t e Minerals Overview Mineral List Mineralogy History Common minerals Amphibole Bridgmanite K-feldspar Mica Olivine Plagioclase Pyroxene Quartz Spinel...

phyllosilicates; as such, it is distinct from other asbestiform minerals in the amphibole group. Its idealized chemical formula is Mg3(Si2O5)(OH)4. The material...

color, and common rock-forming mafic minerals include olivine, pyroxene, amphibole, and biotite. Common mafic rocks include basalt, diabase and gabbro. Mafic...

the red to pink, lilac to purple manganoan variety of tremolite. A rare amphibole, it can be transparent, translucent, and rarely opaque. Hexagonite is...

of the rock. Feldspars, quartz or feldspathoids, olivines, pyroxenes, amphiboles, and micas are all important minerals in the formation of almost all igneous...

Series (Felsic minerals) High Olivine Plagioclase (Calcium rich) Pyroxene Amphibole Biotite (Black Mica) Plagioclase (Sodium rich) Relative Crystallization...

(/ˈɑːrvɛdsənaɪt/) or soda hornblende (partiellement obsolète) is a sodium amphibole mineral with composition: [Na][Na2][(Fe2+)4Fe3+][(OH)2|Si8O22]. It crystallizes...

Nuummite is a rare metamorphic rock that consists of the amphibole minerals gedrite and anthophyllite. It is named after the area of Nuuk in Greenland...

Wollastonite – CaSiO3 Rhodonite – MnSiO3 Pectolite – NaCa2(Si3O8)(OH) Amphibole group Anthophyllite – (Mg,Fe)7Si8O22(OH)2 Cummingtonite series Cummingtonite...

composition of the glimmerites are on average 82% phlogopite, 8% apatite, 7% amphiboles, 2% calcite and 1% dolomite. At some areas, the apatite content is so...

Hornblendite is a plutonic rock consisting mainly of the amphibole hornblende. Hornblende-rich ultramafic rocks are rare and when hornblende is the dominant...