PDCgems
Opal matrix
$50
Matrix opals are found as small veins in ironstone. This is the same type of formation as boulder opal, but the veins are finer (they are actually cracks filled with silica turned opal).
Variety: Opal matrix
Color: Indigo and blue veins
Dimensions: 18.00 x 14.00 mm
Shape: Freeform cabochon
Origin: Australia
Treatment: None
Actual product colors may vary from colors shown on your monitor.