Unique! 6.16ct Pipe Boulder Opal Green Blue Freeform Teardrop Queensland AU

Description

6.16ct Pipe Boulder Opal Freeform Teardrop QLD Australia - YouTube
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For your consideration is a unusual Pipe boulder opal from Queensland, AU.  Regular boulder opal formed as thin seams, within cracks in the hard ironstone rock.  It is thought that pipe boulder, like this one, formed within tubular cavities in the earth.  It's been speculated these cavities are from either tree roots or worm tunnels!  Either way, this is a type of fossil opal.  This gem features bright (3/5) green and blue Pinfire pattern near the top, and rolling Broadflash pattern near the bottom.
The high-domed, freeform-cut gem weighs 6.16 carats.  It  measures 18 mm long, by 11mm wide by 5.5 mm high. As is normal for this material, there is some minor crazing and pitting.  As always, this is a solid, genuine, ALL-NATURAL, untreated gemstone.
FREE PRIORITY SHIPPING on this beauty, and all my premium-grade opals.  This includes any other opals I can fit in the box, so be sure to check out my other opals.
Please Note: You are looking at enlarged photos of a small gemstone- any visable blemishes may NOT be visable to the naked eye.
Of course, I'm delighted to combine shipping!  So don't forget to check my other opals, gems, fossils, and crystals to save on postage.