About Ratna .
Ratna can be of different types. Along with the Traditional ones, there are Astrological, Mystical, Ayurvedic and a Modern list of stones. While the traditional ones reflect the 15th century traditions, the mystical stones are of Tibetan origin and the Ayurvedic stones, associated with 'Ayurveda' an Indian system of Medicine are over thousands of years old. Here we have given the Modern list of Ratna adopted in 1912 by the American National Association of Jewellers.

Sapphire September ( Virgo )	Garnet January ( Capricorn)	Diamond April ( Aries )	Amethyst February ( Aquarius )
Pearl June ( Gemini )	Emerald May ( Taurus )	Turquoise December ( Sagittarius )	Topaz November ( Scorpio )
Aquamarine March ( Pisces )	Ruby July ( Cancer )	Peridot August ( Leo )	Opal October ( Libra )