Brilliant cut :
The modern brilliant cut was developed by Marcel Tolkowsky in 1919. It consists of 58 facets (or 57 if the culet is excluded). It is the most popular modern cut because it provides maximized light return through the top of the diamond.
Aquamarine :
Blue variety of Beryl (Silicate). Aquamarine is named after it's bleu color similar to the blue of the sea. It is a different gemstone than blue Topaze.