I am beginer in this gem hunting, and i thnk i found a precious opal near my home town.im living in small meditrenian country, near Greece. So can you please tell me is this precious opal. Ive watched it under light and magnifging glass and it sparcles ornge and green and little blue colors on some spots. size of the stone is aproximately around 2.20x 1.50 cm in Eu size Thank you.