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) now grown very fond of Aquamarine, and she of them. Hailey and Claire arrive to take Aquamarine back to the ocean. They meet Raymond, who regrets that he cannot bid Aquamarine farewell before he leaves for Florida. Just then, a boy named Arthur falls into the swimming pool. Aquamarine rescues him, with the help of Raymond. Raymond, seeing her tail and thus realizing she is a mermaid, is utterly shocked, however, this discovery does nothing to impair his adoration of her. Hailey and Claire carry Aquamarine to the ocean and cast her into the water, where she is restored to