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
Gemstone Warrior Gemstone Warrior Gemstone Warrior is an action role-playing game written by Canadian developer Paradigm Creators for the Apple II and published by Strategic Simulations in 1984. It is an action-adventure title set against a 2D screen with the player controlling an armored figure that they would move from area to area in search of treasure and the pieces of the stolen Gemstone. "Gemstone Wariror" was SSI's first game to sell over 50,000 copies in North America. The game was ported to the Commodore 64, Atari 8-bit family, and Macintosh. In addition, the games were ported to the N7 Japanese system.