Mineral site, and from there further subdivided by the chemistry of the W site. The Y and Z sites can accommodate a variety of cations, especially various transition metals; this variability in structural transition metal content gives the tourmaline group greater variability in colour. Other cyclosilicates include beryl, AlBeSiO, whose varieties include the gemstones emerald (green) and aquamarine (bluish). Cordierite is structurally similar to beryl, and is a common metamorphic mineral. Sorosilicates, also termed disilicates, have tetrahedron-tetrahedron bonding at one oxygen, which results in a 2:7 ratio of silicon to oxygen. The resultant common structural element is the [SiO] group. The
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