CPDG6-1oz & CPDG6-3oz: Discovered in 1948 Dora Gully, or 12 Mile Opalfield, is still a reliable producer of gems today and is known for healthy white based opal. What this isn’t is expensive top gem opal, but instead an affordable grade with large/medium sized pieces of opal with thin red/blue/green/yellow broadflash fire layers. You can have lots of fun cabbing or carving without spending a fortune and still create a very nice finished product. The photo is of a 650 gram sample from this opal grade. Scale in photo=20mm. Questions? Call 406-651-4947.