Amethyst Stone– Amethyst stone strengthens Saturn and rashi ratna for Aquarius.
Topaz– Precious topaz is a birthstone for November and blue topaz is a birthstone for December.
Turquoise Stone– Turquoise is the traditional birthstone for the month of December..
Opal Stone:- Opal is the Gemstone for Planet Venus and considered Birthstone for October born people.
Beryl Stone:- Beryl is believed to bring good luck and give eternal youthfulness.
Onyx Stone – The gemstone for planet Rahu helps in fighting Kaal Sarp Dosha.
Zircon Stone – Zircon (Jarkan stone) strengthens the planet Venus (Shukra in Hindi)
Resource:- http://www.9gem.com/semi-precious-gems.html
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