Calibrated opal is the term for opal that has been cut and polished in oval sizes that are on a calibrated scale. For example, A 6 x 9 millimetre calibrated opal is a standard size opal and would g...
Why purchase an opal pendant? For centuries pendants have been worn as items of adornment for woman. An opal pendant is eye-catching. The colour play in an opal will mean that the stone when viewed...
What is a Jelly Opal? Jelly opal is an opal that has a jelly look to it. It is just like crystal opal but the opal color is a little bit faint so you can see through the opal pretty easily. Jelly o...
How is Gem Black Opal found? Gem black opal is found in the formation of a nobby (rounded nodule) or in a seam. Lightning Ridge in Australia is the only sedimentary deposit in the world for Gem Bl...
The term cabochon refers to a curved and polished dome. Opals are cut as cabochons and can be cut low, medium or high domed. Advantages of opal cabochons A cabochon cut allows a setting edge for t...