Buy American opal rough from our verified sellers.USA opals have several famous opal fields form Virgin valley in Nevada, Utah , Spencer and Oregon
Virgin valley has beautiful specimens of wood replacement but is not ideal for cutting a s only small percentage is stable for cutting. Some pieces can be treated but it is not common practise as most specimens are kept in water. Virgin Valley opals, named for the region in which they are found, in Humboldt County, Nevada. USA opals are rare, sought-after black opals. Their black matrix contains stunning flashes of red, blue, purple, and green.
Utah has candy stipe and is known for lot stripe patterns and polishes good and reminds people of bacon n eggs for breakfast due to its unique patterns and candy like appearance.
and Mt Shasta which lacks fore of most opals and has grey black veins to transparent green colours and is ok for opal cutting.
Spencer has this bars formed from geyser pressure which is most unusual way to form so most bars are thin and difficulty polish
Oregon are formed as thunder eggs so each opal filed has so completely different way of formation of silica and this volcanic activity is also evident in Rainbow ridge Nevada usa where you can prospect for your own rough and find how difficult it is to obtain rough specimens
All collectors should have few specimens for usa or cutters can cut and polish for their collections