There are many categories of opal when it comes to grading them out.Opals of all different colors are and have different values depending on the color it displays.You can categorize opals by using ...
White opal is a more common opal heavily marketed in the early days of opal trading, which is what most think about when they think of opal.White opal has a very light body tone to it giving the op...
Boulder opal is the most organic type of gemstone. With boulder opal fields stretching right across the ancient inland sea, Queensland boulder opal has a lot of possibilities and prospecting for bo...
Watch me explaining body tone chart and the brightness scale. This is only a guide to show you how the scales work.
Solid black opal is found mainly in Lightning Ridge in Australia. Black opal is a dark-bodied or a dark tint throughout the opal, making the color in the opal bright and beautiful. Solid black opal...
Australian Black Opal comes from Lightning Ridge in the outback of New South Wales, Australia. Commercially it would produce over 95% of the World’s black opal in terms of quantity and quality. Ot...
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...
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...