List of Boulder Opal Ring Pics. Boulder opal consists of concretions and fracture fillings in a dark siliceous ironstone matrix. The boulder opal has been expertly and securely set in a handcrafted fine silver bezel, on top of a sterling backplate.
This beautiful gem was first discovered in 1869 and until then this beautiful opal had lay hidden for millions of years.
The stones often have a more 'earthy'. Low prices, free and fast shipping. Great savings & free delivery / collection on many items. Black opal is the most expensive opal ring and boulder opal is popular for its natural beauty and large size.
