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
Emerald Lingam Lord Budha (Devanagari: बुध ) (Tamil: புதன்) is considered as the god of the planet Mercury. According to Hindu mythology Lord Budha is considered as one among the nine Navagrahas. He represents green color and gemstone emerald. He is also the god of merchandise and protector of merchants. He is of Rajas Guna and represents Communication. as well as the Navagraha. Puranas recommend to worship the gemstone in the form of Siva Lingam. The kings and emperors considered that the statues carved using emerald stones have divine power. They also considered that the emerald stone is free from faults (doshas).