18.93 Ct top gem grade boulder opal

18.93 carats

Natural solid boulder opal

Yaraka mining region, Queensland, Australia

Length: 23.3 mm
Width: 16.2 mm
Depth: 7 mm

Opal ID 3151 is a Top gem Grade boulder opal.

Australian boulder opals of this grade are extremely rare. They score very high in most valuation factors, including, brilliance, colour, pattern and play-of-colour. They often also have a black or very dark body tone.