Matching Split Pair of Koroit Opal or Yowah Nut, natural rough
These Koroit opal stones or Yowah Nuts have had a natural crack along the opal face. The stone is generally cut down and then split in two using the natural fissure. Revealing the natural split face, sometimes with a mirror pattern effect. Being a pair, the value of these are higher than one-off stones.
Koroit Opals, are part of the Boulder Opal family which are characterised by solid brown ironstone matrix or layers interlaced with the opal and are the second most valuable opals in the world after Black Opals. Koroit Opals take their name from the Koroit mining area near Yowah in South West Queensland and are very thought after due to their unique pattern.
Yowah nuts are mini boulders of 5mm to 20cm which host an opal, also specific to the Yowah region.