Big, bold and a little unassuming — one thing is for certain, we’re going to need to bring out the heavy grit wheel to work on this monster gem.Weighing in at a colossal 950 carats, we’ll need to clear the schedule to work on this piece of rough opal. Tips & Tricks Unearthed in the Grawin Feild in Lighntning Ridge, otherwise known as ‘seam opal country’, pieces like this one can be rare due to the size the cavity must be to create it.Slides, fissures and cracks underground caused by movements in the earth for over hundreds of milliions of years create these cavities which fill up with silica spheres…
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