Also found in: Encyclopedia, Wikipedia.
Related to andalusite: sillimanite


A hard, grayish white to pinkish brown mineral (Al2SiO5), occurring as nearly square prisms, often with cruciform cross sections, in metamorphic rock.

[After Andalusia.]


(Minerals) a grey, pink, or brown hard mineral consisting of aluminium silicate in orthorhombic crystalline form. It occurs in metamorphic rocks and is used as a refractory and as a gemstone. Formula: Al2SiO5


(ˌæn dlˈu saɪt)

an orthorhombic form of aluminum silicate, Al2SiO5, found in schistose rocks.
[1830–40; after Andalusia, where it was first found; see -ite1]
Mentioned in ?
References in periodicals archive ?
1993), from chlorite to andalusite in Massachusetts (Robinson 1981), and from chlorite to kyanite [+ or -] sillimanite in New Hampshire (Lyons et al.
5-4% biotite and accessory primary muscovite, zircon, tourmaline, primary andalusite, and cordierite.
Tenders are invited for Procurement of 765 tons of Andalusite for SRU IFICO.
Ragged andalusite grains were noted in a few samples, where it is at least partly altered to sericite, and garnet also is present in a few samples.
continued to invest in andalusite production assets in South Africa and
Minerals for Refractories enhanced its mineral reserves portfolio in the 1st half with the acquisition of high-quality assets in the United States and continued to invest in andalusite production assets in South Africa and China.
0 million) mainly concerned andalusite production in China, minerals for refractories manufacturing in Europe, North America and South Africa, the development of carbonates for paper units in Asia and the supply of rectified structure bricks in Western France.
Preliminary findings confirm gold and silver mineralization coincident with moderate to strong argillic alteration characterized by the presence of alunite, andalusite and tourmaline.
In Minerals for Refractories, a new kiln for producing chamottes is being built in the Andersonville (USA) plant and andalusite production capacity is being extended in Yilong (China).
The pelitic unit may contain staurolite, garnet, and andalusite, whereas tourmaline and rare holmquistite (Hutchinson 1982) occur in the amphibolite adjacent to the pegmatite lenses.
The deposit is hosted by a sequence of felsic to intermediate volcanics with a distinct footwall often containing kyanite and andalusite.