Split Pair Boulder Opal Rubs. 100.55 Carats

Natural boulder opal split pair of pre-form rubs.
Brilliant patterns of blues, purples and greens.
Cut on saw from rough boulder opal rock and split on the colour bar.
Approx. total weight 20 grams
Approx. max. dimensions (1) 31 x 19 x 10 (2) 30 x 18 x 12 mm
Mined in Winton area of central Queensland, Australia.
Photo taken under indoor white light.