Gemstones are believed to have mystical powers. They are thought to have some connections with stars/sun-signs and bring good luck, health, prosperity, happiness to people of the respective birth sign.

Based on their linkage with signs, gemstones are allotted to particular months. Accordingly the gemstone serves his master, born in that respective month. The various gemstones that serve different sun-signs are listed in ascending order of months from January to December.