Gemstone usually found in. For example, diamonds, which have a cubic crystal system, are often found as octahedrons. Gemstones are classified into different "groups", "species", and "varieties". For example, ruby is the red variety of the species corundum, while any other color of corundum is considered sapphire. Other examples are the emerald (green), aquamarine (blue), red beryl (red), goshenite (colorless), heliodor (yellow) and morganite (pink), which are all varieties of the mineral species beryl. Gems are characterized in terms of refractive index, dispersion, specific gravity, hardness, cleavage, fracture and luster. They may exhibit pleochroism or double refraction. They may have luminescence
Aquamarine (novel) but defers on the grounds that Hailey will soon visit. Aquamarine (novel) Aquamarine is a novel by Alice Hoffman, published in April 2001. A film adaptation was released in 2006, although the plot of the film bears little resemblance to that of the book. The story is based upon two schoolgirls, Hailey and Claire, who have lived as neighbors and best friends for many years. Their favorite place for amusement has been the Capri Beach Club for as long as they can remember. However, the Capri Beach Club has become ruinous via neglect by its staff. When Claire's grandparents, with