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Andalusite – A-Z About This Mineral

limz Published On Sat Feb 08 2020   Modified On Sat Feb 08 2020
Andalusite – A-Z About This Mineral

Andalusite is a rock-forming mineral that is an aluminum nesosilicate mineral. Just like Alexandrite, these stones can also change their color when viewed from different directions. These crystals are often large and they have an uneven to subconchoidal fracture.

Andalusite symbolizes positivity, clarity, happiness, honor, loyalty, optimism, and remembrance. They have an orthorhombic crystal system and white streak.

Let us learn more about Andalusite.

Meaning

Andalusite, also known as cross-stone, is composed of sillimanite and kyanite. It is a pleochroic stone that can display different colors in different directions. These stones help to balance and open up the heart and root chakras. It enables the wearer to promote stability in their life, security, basic needs, unconditional love, compassion, and joy. Throughout history, these crystals have been used for healing and decorative purposes.

Origin and History

Rare Andalusite Gem Crystal.
Rare Andalusite Gem Crystal.
Image Source: iRocks.com

Also known as "Poor man's Alexandrite", Andalusite got its name from Andalusia where it was thought to be first discovered. But in fact, the first discovered specimen was from El Cardoso de la Sierra of Spain. This name was given by Jean-Claude Delamétherie, a French geologist. In 1754, these crystals were described chiastolite variety by a French author, José Torrubia, a Spanish Catholic missionary, scientist and author, in his famous book "Aparato para la Historia Natural Española".

Formation Process

Andalusite is a rock-forming mineral that forms during the regional metamorphism of shale. It is mostly found in the schist (a still higher degree of metamorphism) and gneiss (a medium to coarse-grained, irregularly banded rock) at some present. It can also be found in ancient convergent plate boundaries. In this, the rocks should be exposed to the required temperatures and pressures.

Formula

The chemical formula of Andalusite is Al2SiO5. These stones have a hardness of 6.50-7.5 and they have a vitreous luster. 

Types

  • Chiastolite
  • Titaniun Andalusite
  • Viridine

Colors Available

Multi-color Andalusite Gemstone.
Multi-color Andalusite Gemstone.
Image Source: GemSelect
  • Pink
  • Violet
  • Yellow
  • Green
  • White
  • Gray

Mines Available

  • Agua Rica Mine, Catamarca ProvinceArgentina
  • Sceptre Mine, New South Wales, Australia
  • Tasna Mine, Potosi, Bolivia
  • Beaverdam gold mine, Nova Scotia, Canada

Cost Per Carat

Andalusite value can vary from $20 to $200 per carat and we can determine the value of these stone by its color.

Uses

  • Andalusite is used to manufacture high-temperature porcelain of spark plugs.
  • It is also used to make high-temperature ceramics.
  • Chiastolite, a variety of Andalusite, is often used in jewelry as a Christian symbol.

Spiritual Properties

  • Andalusite helps one to stabilize and ground themselves, reduce anger, reduce energy drain, protect themselves from psychic attack, and follow the true path.
  • It is often used as a healing stone that aids eye-related problems, regulates the nervous system, and removes toxins from the body.
  • It also helps to enhance memory, bring balance in one's life, reduce fear and conflict, promote self-realization, and improve serenity of mind.

Facts

Beautiful Andalusite and Diamond Ring.
Beautiful Andalusite and Diamond Ring.
Image Source: Pinterest
  • Andalusite can be commonly found in low-pressure metamorphic rocks.
  • When cut into gems, these stones are extremely beautiful, but it is a lesser-known gem type.
  • The density of Andalusite is 3.16-3.20.
  • It is a semi-precious gemstone with transparent to nearly opaque diaphaneity.

Jewelry Stores Near You

  • Dearborn Jewelers, Plymouth, Michigan, US
  • Rocks & Co., Birmingham, UK

Online Stores

  • Gem Rock Auctions
  • Gem Fame

Visit Stoneharu for more information about stones and gems.