PDCgems
Boulder opal
$180
Boulder opals are found in ironstone. The valuable material is often in veins or in layers too thin to be extracted from the bedrock.
Boulder or boulder opal is often larger and less expensive than black opal, although its color play is fantastic given its dark background. It can be considered more resistant compared to black opal.
Variety: Boulder opal
Color: Beige and green and purple color schemes
Dimensions: 24.00 x 20.00 mm
Shape: Rectangle drilled on the side
Origin: Australia
Treatment: None
Actual product colors may vary from colors shown on your monitor.