Iolite 1.38 ct.

Iolite

is a magnesium iron aluminium cyclosilicate with formula Mg2Al3O and hardness of 7-7.5.

Is the gem variety of the mineral cordierite also called “water sapphire”

It is famous for it's very strong pleocroism ( tricroism) , the changing colors depending of the light rays directions, in fact if you move the stones against the light you will see 3 distinct colors: blue/violet,yellow and also colorless.There is nice story regarding the vikings: they used this stone in order to navigate in the cloudy days,they were able to find out the sun position. Small inclusions.

From India.

Size:9.2x6.6x4 mm.

Weigth:1.38 ct.

CODE#3523