Versión en español: http://elgatofausto.blogspot.mx/2012/03/quiero-un-opalo.html
Beatiful and uncanny stone, appear a extreme hardness but in reality is fragile. Changes its glint depending of intensity and light angle as well as temperature. Is almost impossible to cut and give it shape because it breaks in surface leaving terrible wounds impossible to heal.
Has existed in our history from since greeks on century VI BE (before our era) believed who carry it, would clairvoyant. For romans to have a opal meant power, even roman senator Nonio, preferred exile to give to Marco Antonio a ring embedded with opal.
In midles age, was considered protective against eye and heart diseases, and cholera.
Was until XI century that, Roberto the Devil said opal that he had giving to him malignant powers, so the opal reputation fell from grace, and almost form the stone malignancy, ocurred in XIV century that victims of the Black Death had an opal, this increases its glint when the carrier contracted the deseases and this overshadowed when the carrier died. Nobody cared that opal is susceptible to corporeal temperature changes. Opal fell from grace.
In the XIX century, all ring carrying in spanish royal family perished, without exception, no matter that cholera struck that region killing more than 100 000 persons between summer and autumn in 1885.
Now that the human is no longer superstitious as it was in the Dark and little less in Renaissance, the stone no longer have human curses.
For that and other things... i want an opal