A nice cantera opal from Mexico with a good solid patch of precious opal right in the middle of the matrix. This could also be called a boulder opal.
Summary:
Weight: 4.2 carats
Size: 13.5mm x 11.7mm x 5.2mm
Polished with a flat back.
100% natural stone, no treatments or backing.
Ready to ship, you'll receive the exact stone pictured.