Opals are a hydrated and amorphous form of silica, which happen to have a water content of around 3% to 21%. Thanks to its amorphous character, it is classified as a mineraloid instead of a mineral. Precious opal ranges from clear through white, gray, red, orange, yellow, green, blue, magenta, rose, pink, slate, olive, brown, and black. Of these hues, the black opals are the rarest, whereas white and greens are the most common. It varies in optical density from opaque to semitransparent. Opals have an amorphous crystal system, and have a hardness rate of 5.5-6.0 mohs.
About Fire Opal
The name is pretty obvious, it comes from the fiery resemblance it has. The red hue of Fire Opal can go from deep red to fiery orange. When the Opal exhibits no play of color is sometimes referred to as jelly opal. Unlike most opals, Fire Opal occurs with good transparency, and this is the reason why the stone faceted rather than polished like normal opals. They best when viewed in daylight, just after sunrise or before sunset, which exposes and maximizes its fantastic color. Fire opal is associated particularly with Mexico.
It has been known that Fire Opal has helped many people enduring depressions, and also have helped people to seek and find true and real love. Fire Opal is great for stimulating originality and creativity as well. It has the ability to absorb negative ideas and feelings, and converting them into positive emotions. Fire opal carries strong karmic powers, representing justice and also providing protection for its wearer.