Very large, super beautiful BOULDER EDELOPAL .
The gel-like OPAL surfaces on the ferrous sandstone clay matrix are light to dark blue in color, a vein with many GREEN SPOTS The OPAL SURFACE is covered in lightning, depending on the incidence of light.
from the QUILPIE OPAL FIELDS
SOUTH WEST QEENSLAND - Australia
Weight: 270 g Dimensions: 9 x 5 x 3.5 cm
The last picture shows the underside of the typical QUILPIE BOULDER OPAL MATRIX