Is andalusite a rare stone?
Although Andalusite as a mineral is not uncommon, the transparent variety used as a gem is very rare. Another important form of Andalusite that is entirely different is the mostly opaque Chiastolite variety, which is known for its unique cross-shaped design within the body of a crystal.
Is andalusite expensive?
Andalusite is on average $40 dollars per carat. However, andalusite gemstones that feature custom cuts, and a higher than average play of light and colors, are valued at higher prices. *Unlike most gemstones that are cut to minimize color play, andalusite is cut to maximize the full pleochroic effect.
How rare is andalusite?
Andalusites in the 5 to 10-carat range cost several times more per carat than smaller stones. Stones over 10 carats are quite rare, and those over 20 carats are still rarer. Smithsonian Institution (Washington, DC): 28.3 (brown, Brazil), 13.5 (green/brown, Brazil).
What Colour is andalusite?
Color: Shades of yellow, olive green, and reddish-brown. Treatment: Andalusite is rarely treated. Mohs hardness scale: 6-1/2 to 7-1/2 (Diamonds are a 10; the International Gem Society rates it “Very Good” for wearability.)
How do you identify andalusite?
Keys to identification are high relief, low birefringence and parallel extinction. Color – generally colorless, rarely reddish. Often cloudy due to inclusions. Twinning – Although rarely seen in thin section, some andalusite shows distinctive penetration twins, forming a cross, that helps identify andalusite.
Is andalusite a garnet?
The 18th-Century Gemstone Andalusite Garnet is an Inexperienced Gemstone that occurs in earthy or fall colors set as orange-yellow, brown, green and gold. This Unusual Gemstone is found in Spain, Russia, Madagascar, Australia, Brazil, and Sri Lanka and in the Inyo Mountains of California.
What is the value of andalusite?
Andalusite Price List
|Andalusite Price List|
|Color||Weight range||Price range / USD|
|Multicolor||under 1ct||$20 – 100/ct|
|Multicolor||1ct +||$50 – 300/ct|
What is andalusite good for?
Andalusite is the seeing stone that promotes the desire for self-realization, helping one to rebalance and re-align. This stone helps the wearer in discovering problems and emotional blockages while pointing the wearer to the possible resolution. It is also a protection stone and used to ward off the evil eye.
What is the hardness of andalusite?
7 – 7.5
Andalusite/Hardness (Mohs hardness scale)
Is andalusite a crystal?
Andalusite Geological Properties Andalusite is an aluminum silicate mineral that can be found in low-pressure metamorphic rocks where it crystalizes, forming prismatic crystals or massive columns. It is a polymorph or aluminum silicate, which consists of two other minerals: kyanite and sillimanite.