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
Shades of cyan one of the Sharpie (marker) permanent markers but not as bright on the marker. However, there is no mechanism for showing fluorescence on a computer screen. Aquamarine is a shade of cyan toned towards green. It is named after the mineral aquamarine, a gemstone mainly found in granite rocks. The first recorded use of "aquamarine" as a color name in English was in 1598. AuroMetalSaurus is dark grayish shade of cyan. Blue-green has been a Crayola color since 1930. Displayed at right is the color Caribbean Current. At right is displayed the color celeste. Bleu celeste ("sky blue") is a