This is a transparent gemstone with a light water blue beryl and iron. It has a green-blue shade that can vary between pale blue and deep sea blue. The stone’s price increase with the degree of darkness of its shade. Even though blue aquamarine stones are most common, there is another variety which comes in various shades of greenish blue. But those stones are not pure and should be avoided. Aquamarine is comparatively inexpensive and found in India, Brazil and Siberia. This stone is artificially heated to produce a blue shade that is extremely popular in modern jewellery. Allison Australian gem Collection has a beautiful 46 carats aquamarine stone. As it is a variety of beryl, this stone belongs to the emerald’s family. While buying an aquamarine, always choose on the basis of its purity, brilliance and dark shade.