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Andalusite: The mineral andalusite information and pictures

The Mineral andalusite Andalusite is known for its interesting variety Chiastolite , which contains a distinctive pattern within the crosssection of a crystal The pattern is usually crossshaped, and is caused by dark inclusion s of carbon or clay

What is Andalusite? What is Chiastolite?

What is Andalusite? Andalusite is a rockforming mineral that is mined for use in hightemperature refractories Gemquality specimens are cut into faceted gems and cabochons Andalusite forms during the regional metamorphism of shaleIt is found in schist and gneiss at some present and ancient convergent plate boundaries where the rocks have been exposed to the temperatures and pressures

Andalusite Mineral Data

General Andalusite Information : Chemical Formula: Al2SiO5 = Al[6]Al[5]OSiO4 : Composition: Molecular Weight = 16205 gm Aluminum 3330 % Al 6292 % Al 2 O 3: Silicon 1733 % Si 3708 % SiO 2: Oxygen 4937 % O: 10000 % 10000 % = TOTAL OXIDE

Mineral Discovery Andalusite | Imerys

IDEAL FOR REFRACTORIES Andalusite is a naturally occurring aluminosilicate mineral commonly found in metamorphic rocks It is a highpurity mineral composed of prismatic and anhydrous crystals Containing up to 60% alumina, andalusite transforms into mullite at low temperatures of between 1,200°C and 1,550°C This refractory mineral offers properties such as high resistance to degradation

Andalusite: The gemstone andalusite information and pictures

Andalusite gemstones are remarkable for their fascinating color habits and very strong pleochroism, which can cause a muliticolored effect of shades of yellow, olivegreen, and reddishbrown within a single gemAlthough Andalusite as a mineral is not uncommon, the transparent variety used as a

Andalusite Wikipedia

Overview

Andalusite Mineral Information, photos and Facts

Andalusite Mineral Facts: Chemical Formula: Al 2 Si0 5 Aluminium silicate, a basic orthosilicate Sillimanite and kyanite both have the same empirical chemical composition but are different minerals Colors: Red, reddish brown, olivegreen The mineral, when fresh, is greenish or reddish and transparent

Andalusite: The gemstone andalusite information and pictures

Andalusite gemstones are remarkable for their fascinating color habits and very strong pleochroism, which can cause a muliticolored effect of shades of yellow, olivegreen, and reddishbrown within a single gemAlthough Andalusite as a mineral is not uncommon, the

Mineral Discovery Andalusite | Imerys

IDEAL FOR REFRACTORIES Andalusite is a naturally occurring aluminosilicate mineral commonly found in metamorphic rocks It is a highpurity mineral composed of prismatic and anhydrous crystals Containing up to 60% alumina, andalusite transforms into mullite at low temperatures of between 1,200°C and 1,550°C This refractory mineral offers properties such as high resistance to degradation

Andalusite Mineral Information, photos and Facts

Andalusite Mineral Facts: Chemical Formula: Al 2 Si0 5 Aluminium silicate, a basic orthosilicate Sillimanite and kyanite both have the same empirical chemical composition but are different minerals Colors: Red, reddish brown, olivegreen The mineral, when fresh, is

Kyanite, Andalusite, Sillimanite, and Mullite | Minerals

Andalusite is a yellow, brown, green, or red orthorhombic mineral that occurs in thick, almost green prisms in schist, gneiss, and hornfels Gemquality andalusite exhibits a strong pleochroism— brownishgreen in one direction and brownishred perpendicular to it Andalusite also occurs in placer concentrations where it has weathered out of rock

ANDALUSITE Imerys Refractory Minerals The global

Andalusite presents three main properties Andalusite is a prismatic and anhydrous crystal; Andalusite is a high purity mineral; Andalusite transforms into mullite at low temperature, between 1200 and 1550°C for micronized grades Andalusite is available out of France (Kerphalite™) and South Africa (Durandal™, Purusite™, Randalusite™)

Andalusite Value, Price, and Jewelry Information Gem Society

Andalusite is polymorphous with kyanite and sillimanite This means these gemstones share the same chemistry but have different crystal habits Although andalusite occurs abundantly as a mineral, material transparent enough to facet occurs quite rarely

Andalusite an overview | ScienceDirect Topics

Andalusite is an aluminum silicate (Al 2 SiO 5) mineral (Fig 112) formed under regional metamorphism or at contact metamorphic zone around intrusive igneous rocksAndalusite is a rockforming industrial mineral and belongs to andalusite, kyanite, and sillimanite group, important for the geothermometry and geobarometry of metamorphic rocks

YupRocks Pictures of the Mineral Andalusite

Andalusite possesses a vitreous characteristic, occurring in the colors such as violet, pink, yellow, green, gray and white The application of Andalusite includes the production of refractory bricks, in making beautiful Andalusite jewelry and, in Feng Shui This mineral falls under hard mineral and hence an ideal choice for jewelry designing

Andalusite definition and meaning | Collins English Dictionary

Andalusite definition: a grey , pink , or brown hard mineral consisting of aluminium silicate in orthorhombic| Meaning, pronunciation, translations and examples

Andalusite Mineral Specimen For Sale Dakota Matrix

Andalusite A terminated dark purplish brown stubby, prismatic Andalusite crystals This and many more mineral specimens are available for sale at Dakota Matrix Minerals

Andalusite Value, Price, and Jewelry Information Gem Society

Andalusite is polymorphous with kyanite and sillimanite This means these gemstones share the same chemistry but have different crystal habits Although andalusite occurs abundantly as a mineral, material transparent enough to facet occurs quite rarely

Andalusite, our aluminosilicate mineral | LKAB Minerals®

Andalusite is an aluminosilicate mineral occurring in metamorphic rocks as elongated rhombic prisms, sometimes of gem quality Andalusite is used extensively where greater thermal shock resistance is required Additionally, refractories made with Andalusite can be used effectively under abrasive conditions

GemQuality Andalusite from Brazil | Gems & Gemology

Widely known as a rockforming mineral, andalusite is not frequently encountered as a gem material This article documents the gemological and spectroscopic properties of numerous rough and cut samples of gemquality andalusite from Brazil The color varied from yellowish green and green to brownish

Andalusite | Physical Optical Properties, Uses, Occurrence

Physical Properties of Andalusite

Kimberley Minerals Western Australian Mining Tenements

Andalusite is a rock forming aluminium neosilicate mineral with the chemical formula Al₂SiO₅ that is mined for use as a refractory mineral with applications in

Andalousite — Wikipédia

L’andalousite est un minéral réfractaire disposant d’une excellente résistance aux chocs thermiques L’andalousite est ainsi utilisée dans les industries métallurgiques (fer, aluminium), cimentières, céramiques et verrières, où elle est le plus souvent mise en œuvre sous forme de briques réfractaires

Andalusite Mineral Information, photos and Facts

Andalusite Mineral Facts: Chemical Formula: Al 2 Si0 5 Aluminium silicate, a basic orthosilicate Sillimanite and kyanite both have the same empirical chemical composition but are different minerals Colors: Red, reddish brown, olivegreen The mineral, when fresh, is greenish or reddish and transparent

Andalusite an overview | ScienceDirect Topics

Depending on the P, T conditions, aluminosilicates Al 2 SiO 5 exhibit three polymorphs: andalusite, sillimanite, or kyanite (Fig 7)The polymorphic transformations are sluggish because of the very low differences between their Gibbs free energies All of the polymorphs share a common crystal structure, ie, chains of AlO 6 edgeshared octahedra parallel to the c