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) "mixed or average reviews." In its opening weekend, "Aquamarine" grossed $7.5 million in 2,512 theaters, ranking #5 at the box office. By the end of its run, the film grossed $18.6 million domestically, and $4.4 million internationally, for a worldwide total of $23 million. Two of the film's main stars, Emma Roberts and Sara Paxton, were featured on the soundtrack. JoJo, however, an accomplished singer with one album out did not take part. In 2008, La La Land Records released a limited edition CD (1000 pressings) of David Hirschfelder's score (incorporating the voice of Sara Paxton) for the film. Aquamarine