Opal means precious and the stone totally worth it because of its physical and cosmic properties. Nowadays founding a natural opal gemstone is not a piece of cake because markets are full of money making people who only care of themselves. So, it's important to take a prescription of renowned astrologers before buyingopal gemstone. Opal stone is a very attractive Gemstone. Opal has suddenly become very popular and desirable due to its beauty and play of color (Fire) effect. Opal is Birthstone of October month. Opal along with Diamond is very effective astrological gemstone for Venus (Shukra) Planet.