Yellow Opal is a type of Common Opal that ranges in color from a dark yellow to a near translucent “sunny” gold. All Opals are Amorphous (occurring in no defined shape) and can be seen in massive forms as well as stalactitic, nodular or botryoidal. Opal is a semi-precious gemstone of silicate mineral family recognised for its wonderful ‘play of colors’. This astrological substitute of precious diamond is worn for success in creative pursuits, luxurious lifestyle, high social status, matrimonial harmony and good health. Opal gem is recognised for its astrological properties and aesthetic charm.Opal mines are discovered in Australia, Ethiopia, Mexico, Brazil, Sudan, Hungary and U.S.A. Of all origins, Opal from Australia is widely popular for its bright hue and rich fire. Color is the most influential factor for evaluating the Opal’s value.Opal value in the market largely depends on the origin, color, clarity, play-of-color, shape and carat weight of the gemstone. Due to the popularity of Opal stone in the Indian and international market, Opal cost is also affected by the supply and demand cycle.