Opal.

As structure of silica, in sun light reflecting of light play, as all rainbow colours of cream till a burn black and blue.A stone with a bad reputation, occultism shares,that he can carries a sign of Libra, as this stone to such peoples giving success, dreams come true, as in other entering breaking, as entering of angry behavior, and this stone used for a future to see and divination's, like talisman used for success in all beginnings, As very good for success and happiness is black opal, but this stone balancing for the psychical perfection, sharpening emotions, feels, helping for itself managing. As opals using in magic rituals, they are giving a for a force clairvoyance, give for a future, and helping for communication between peoples and friendship, and for angry peoples he will  give many bad accidents.As opal is a stone water,his periodically entering in a cold water, and cracking his is on air, in dehydration or touching with fats, and oils, loosing play of colour and transparent.
On the middle centuries if a carry his necklace is help for hairs keep an own colour, but a modern litotherapy use his for a cure cardiovascular diseases, nerves, hypophis, ephyphisis, infections, as and affecting on chakras depend of a colour, as he is ability affecting on an all chakras. As curing helping nerves, melancholia, hheart, sense loosing, brain function normalizing, care of hot passions, returning vision sharpness and eyes shyness, helping for organism to assimilate a protein, good for lungs, as fire fortune opal helping in a cure of sex organs, balancing all functions of organism, rising potency.