It is believed that, when the creator (God) arrived on earth on a rainbow to spread the message of peace and love; the stones beneath, where he landed absorbed the colors of rainbow. It is believed that Opals are those same stones as they display a charismatic play of colors.
 Opal exists in numerous colors -as dark or black, fiery orange, to sultry white or light etc.  At times a single stone may display numerous hues like grey, red, orange, yellow, green, blue, magenta, rose, pink, slate and olive. The more the transparency and color the more valuable is the stone. This is particularly true for Fire Opal. Milk opal, resin opal, wood opal, menilite opal are some of the more commonly found stones.
Australia is the number one opal exporting country, along with USA, Hungary, Turkey and Indonesia. Sometimes Opals are synthesized in the labs to meet the huge demand in the market among those who are born in the month of October.
Opal is the Birthstone of October; its healing powers reduce stress, helps find love, changes emotions and moods to the wearer.  It is recommended to wear an opal if one wants to change ones equation his/her near and dear ones.