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.
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.
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".
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.
The chemical formula of Andalusite is Al2SiO5. These stones have a hardness of 6.50-7.5 and they have a vitreous luster.
Andalusite value can vary from $20 to $200 per carat and we can determine the value of these stone by its color.
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