RARE 1.85 CARAT BRAZIL NATURAL ANDALUSITE

Andalusite is pleochroic, i.e. it shows different colours in different directions. When cutting most pleochroic gemstones, such as iolite and tanzanite, the trick is to minimise the pleochroism and maximise the single best colour. With andalusite the opposite applies: cutters try to orient the gem to get a pleasing mix of colours: orange-brown and a yellowish green or gold.

When they succeed, andalusite looks quite unlike any other gemstone, with patterns of colour dancing around the facets.  it is not really a colour-change stone at all because the colours are present at the same time.
Andalusite is mined in Brazil and Sri Lanka.
 

KEY TO CLARITY

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