Beauty and Value of Boulder Opal Rings As more and more people got to know about Boulder Opals, there was a surge in the demand for this opal variety. The surge in demand could not keep up with the supply of this gemstone, and this was why the Prices of Boulder Opal rings increased in a short span of time.It’s interesting to note that since the gemstone jewelry manufacturers could get enough supply of Boulder Opals, they started using the specimens in irregular shapes (which are basically freeform shapes) with fancy cuts. READ MORE - https://www.rananjayexports.com/blog/boulder-opal-rings-value-and-identifying-quality-colors