Opal (Maplet)

This is the entry for opal from Maplet's A Greene Forest

Of Oppalus.

Oppalus (as saith Diascorides) is a stone in colour like to verie many, and those cleane contrarie Gems. For it representeth in some part as good a greene colour as the Smaradge: in some other part it looketh Purple, and in another part like to a whote Cole as the Carbuncle doth.