The history of agate can be traced back more than 2000 years

Amazonite aka Amazon Stone blue green variety of the mineral microcline

Amethyst purple variety of the mineral quartz. Birthstone for February

Angelite a blue stone used primarily for its healing properties

Apatite occurs in many colours. It can also be colourless or multicoloured

Aquamarine popular gemstone and blue green variety of the mineral beryl

Aragonite named after Molina de Aragón where it was discovered in 1797

Aventurine variety of quartz usually identified by its platy inclusions

The minerals azurite and malachite are both forms of oxidised copper