Its colouring is due to iron. Its much sought-after colour is major blue, but by heating it at more than 400°, one manages to give this deep blue to stones of less quality.
We find inclusions in aquamarine in the shape of small channels: according to their frequencies, they can cause a cat's eye effect and even more rarely an effect of asterism.
It belongs to the group of beryls just like her famous cousin the emerald.
Attention for the owners of aquamarine: it is a stone sensitive to the shock!
History :
Aquamarine takes one's name from its "ocean" color: that's why this stone is an amulet for the sailors !
Deposits :
The countries having deposits are :
Country
Quantity
Quality
Comment
Brazil
Record: 110.5 kg for an aquamarine of jewellery quality!
Aquamarine 
