AndalusiteAndalusite

Andalusite

This beautiful and intriguing gemstone was named after Andalusia, the province in Southern Spain where it was first discovered.  Andalusite is first mentioned in historical records in 1789.  Today, gem-quality material is found in Brazil, Sri Lanka, Madagascar, USA, Russia, Myanmar and China.


It is a pleochroic gemstone, meaning that it displays different colors when viewed from different directions.  A good specimen will show a mix of orangy-red, green, and straw-yellow, making it visually exciting and interesting.  Some excellent examples of andalusite are available to view on our website.


When cutting most strongly pleochroic gemstones, such as tanzanite, iolite and kunzite the aim is to cut the stone to bring the most attractive single colour to the fore and to minimise the pleochroism.  However, with andalusite the aim is to cut the stone to show the most pleasing mix of the colours.  Quality varies widely, lower Grade stones show predominately palish green and little else, many are poorly cut resulting in a ‘window’ through the stone.  

Always look for a stone that has a good colour mix and is well cut.  Good quality smaller stones (from 1 - 2 carats) are moderately priced.  Price per carat increases with size due to the scarcity of rough material and can be high for exceptional pieces.  oagems.com carefully select the best quality available in a range of sizes and we try to have 10-20 stones in stock at all times.   Large stones of high quality have not been readily available in the last twevle months due to porr mining yeilds in Brazil.


Mohs’ Hardness: 7.5

Specific Gravity: 3.15-3.30

Refractive Index: 1.629-1.691