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) with Raymond, after which she must leave. To compensate for her nudity and lack of legs, they plan to dress her in a long blue gown and place her in a wheelchair. Before the meeting, the two girls confide their story in Claire's grandfather, Maury. He believes their story because of his own encounter with a mermaid once. He takes them to the Capri Beach Club, where they organize the table and food for Aquamarine and Raymond. They then lift Aquamarine out of the pool – an operation wherein Claire must overcome a hesitation to enter water – and introduce