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 (film) Aquamarine (film) Aquamarine is a 2006 Australian-American teen fantasy comedy film starring Sara Paxton, Emma Roberts, and JoJo. The film, which was made in both the United States and Australia, was released in North America on March 3, 2006. The film was loosely based on a young adult novel of the same name by Alice Hoffman, and was directed by American director Elizabeth Allen Rosenbaum. The film was filmed in Queensland, Australia. 13-year-old best friends Claire Brown (Emma Roberts) and Hailey Rogers (JoJo) are upset to know that they will be separated in five days as Hailey has to move