from the QUILPIE OPAL FIELDS in SOUTH WEST QUEENSLAND
Raw EDELOPAL with " GREEN SPOTS" depending on the incidence of light
BOULDER OPALS are so-called MATRIX OPALS - belong to the EDELOPALS
The MATRIX is a ferrous clay - sandstone
Weight: 40 g Dimensions: 6 x 2.5 x 1 cm