Vopros Posted February 20, 2023 Share Posted February 20, 2023 This is a boulder opal from Australia. it is 12 x 8.4 x 3.2mm could it be a bone? Link to comment Share on other sites More sharing options...
Fossildude19 Posted February 20, 2023 Share Posted February 20, 2023 The picture is too blurry to make out any kind of detail. Tim - VETERAN SHALE SPLITTER VFOTM --- APRIL - 2015 __________________________________________________ "In every walk with nature one receives far more than he seeks." John Muir ~ ~ ~ ~ ><))))( *> About Me Link to comment Share on other sites More sharing options...
Vopros Posted February 20, 2023 Author Share Posted February 20, 2023 10 minutes ago, Fossildude19 said: The picture is too blurry to make out any kind of detail. There are usually no details thar survive in opals. I am asking about the shape. Does the shape look as it could be a bone? Link to comment Share on other sites More sharing options...
Fossildude19 Posted February 20, 2023 Share Posted February 20, 2023 Still too close, and no size reference. To me, from this photo, I would say no. Tim - VETERAN SHALE SPLITTER VFOTM --- APRIL - 2015 __________________________________________________ "In every walk with nature one receives far more than he seeks." John Muir ~ ~ ~ ~ ><))))( *> About Me Link to comment Share on other sites More sharing options...
Vopros Posted February 20, 2023 Author Share Posted February 20, 2023 Here is the opposite side Link to comment Share on other sites More sharing options...
Mahnmut Posted February 20, 2023 Share Posted February 20, 2023 Well, of course for all kinds of fossilization, less detail is the default, much detail is luck. As far as I know, boulder opal is not the kind that usually preserves vertebrate fossils, sometimes opalized wood is labeled as "boulder opal" though, because of the opaque parts. In most boulder opals the structure is mainly given by shrinking fissures like the ones so beautifully filled with colourful opal in your specimen. On the other hand, opal can preserve much finer detail than most other fossilbearing rocks, as is apparent in your recent post: http://www.thefossilforum.com/index.php?/topic/129669-opal-lungfish-tooth-plate/&tab=comments#comment-1401986 As far as I know, that kind of fossil is found at lightning ridge and nowhere else (may be wrong though) I think the shape of this one (not the lungfish tooth) is a freeform polished gem, but thats of course just my opinion based on lowres pics. Best Regards, J Try to learn something about everything and everything about something Thomas Henry Huxley Link to comment Share on other sites More sharing options...
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