Opal is from the Lightning Ridge mining fields in. The fire in this opal is bright golden green and purple.The colours roll in large chasing rolling flashes over the face of the stone. Moving from the brightest golden green followed by purple and back to green. 8.4 x 6.4 x 3.0 mm. Note: Great in all lights. The opals we sell are natural SOLID opals and have not been treated or enhanced in any way. This is the scale of brightness used to show the brightness of an opal. This is colour of the opals body tone; it can be black, dark (semi-black) or light opal. N1 is jet black through to N9 which is white. The item "ATC6205 SOLID SEMI BLACK OPAL Clean bright fire" is in sale since Thursday, April 28, 2011. This item is in the category "Jewelry & Watches\Loose Diamonds & Gemstones\Loose Gemstones\Opal\Other Opals". The seller is "aussietreasurechest_opals" and is located in Down Under. This item can be shipped worldwide.