Australian Green Opal is a variety of Common Opal which is a mixture of Opal and nontronite. Common Opal is generally opaque, without the play of color present in more...
African Green Opal is a form of Common Opal, an opaque stone that does not display the play of color seen in more precious Opals. It does have the distinctive...
African Green Opal is a form of Common Opal, an opaque stone that does not display the play of color seen in more precious Opals. It does have the distinctive...
African Green Opal is a form of Common Opal, an opaque stone that does not display the play of color seen in more precious Opals. It does have the distinctive...