• Andalusite - Wikipedia

    en.wikipedia.org/wiki/Andalusite Andalusite is trimorphic with kyanite and sillimanite, being the lower pressure mid temperature polymorph. At higher temperatures and pressures, andalusite may convert to sillimanite. Thus, as with its other polymorphs, andalusite is an aluminosilicate index mineral, providing clues to depth and pressures involved in producing the host rock.
  • Andalusite: Meanings, Properties and Powers - The Complete ...

    meanings.crystalsandjewelry.com/andalusite Andalusite is an aluminium silicate mineral that can be found in low-pressure metamorphic rocks. It’s composed of Sillimanite and Kyanite. Andalusite is well known for its ability to change colors when viewed from different directions. The stone’s colors are a result of pleochroism. Its color is usually yellow-brown or green-brown, even ...
  • What is Andalusite? What is Chiastolite?

    geology.com/minerals/andalusite.shtml What is Andalusite? Andalusite is a rock-forming mineral that is mined for use in high-temperature refractories. Gem-quality specimens are cut into faceted gems and cabochons.. Andalusite forms during the regional metamorphism of shale.It 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 Value, Price, and Jewelry Information - Gem Society

    www.gemsociety.org/article/andalusite-jewelry-and-gemstone-information 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: The mineral andalusite information and pictures

    www.minerals.net/mineral/andalusite.aspx Andalusite is known for its interesting variety Chiastolite, which contains a distinctive pattern within the cross-section of a crystal.The pattern is usually cross-shaped, and is caused by dark inclusions of carbon or clay.It is usually only visible when a crystal is cut.
  • Wisconsin Geological & Natural History Survey » Andalusite

    wgnhs.wisc.edu/minerals/andalusite Andalusite is also reported as crystals up to 1.5 cm. long in a talc schist body associated with anthophyllite, cummingtonite, almandine and kyanite. (Jones, 1978). Kimball and Spear (1984) suggest it forms here as a replacement of earlier formed staurolite.
  • Andalusite Information - Fall colors play on this rare ...

    www.gemselect.com/gem-info/andalusite/andalusite-info.php Andalusite is a rare and reasonably expensive gemstone so a certified gemstone from a reputable dealer is the best approach but this is not always easy when you are searching the internet or gem stores for a great example or a bargain! Before buying an Andalusite gemstone, familiarize yourself with its appearance. ...
  • Andalusite - Metaphysical Healing Properties

    www.healingwithcrystals.net.au/andalusite.html Andalusite occurs as brown, red, white, orange and green crystals. The gem quality crystal is translucent to transparent. The crystal habit is prismatic with a cross (chaistolite), massive and granular. Chiastolite - is the opaque variety of the andalusite mineral. When the crystal is cut through, its cross-section will usually show an off ...
  • Andalusite: Mineral information, data and localities.

    www.mindat.org/min-217.html Novák, M. & Škoda, R. (2007): Mn3+-rich andalusite to kanonaite and their breakdown products from metamanganolite at Kojetice near Třebíč, the Moldanubian Zone, Czech Republic. Journal of Geosciences, 52(1-2), 161-167. Žďár nad Sázavou District ⓘ Bobrůvka; Paulis P. (2001): Nejzajimavejsi mineralogicka naleziste Moravy a Slezska.
  • Andalusite: Buy Andalusite Gemstones at Affordable Prices

    www.gemselect.com/andalusite/andalusite.php Andalusite is a little known gemstone which usually comes in earthy or fall colors such as orange, yellow, brown, green and gold. It is rated at 7.5 on Mohs hardness scale so it is suitable for all types of jewelry. It is not often found in very large sizes but is available in convenient calibrated lots for jewelry design or display.