All grahas have an associated gemstone with them. In this I will talk about these gemstones.
Ruby is the gemstone associated with Sun aka Surya. Ruby is a pinkish red to blood red corundum.
Ruby makes sun stronger and is very auspicious for persons with Aries, Leo and Saggitarius ascendants.
Ruby should be worn for the first time on a Sunday morning. Ruby should be worn on the ring finger.