sunny pics of left/right swirl on one mib

[SequoiaBET]

I took some pics in the sun per your suggestion Akroorka. Hope it helps. The marble is just under 3/4 inch. The pontil is in the first pic. It looks more polished/smoothed and doesn't show well in the pic. If I understand correctly, the maker would often clean up the pontil on a nicer marble, as opposed to the more 'mass made' handmades. Or maybe it is a transitional and the rollers smoothed it out some? Or maybe I have no idea what I'm talking about... I have some, but not extensive, marble experience and exposure. Thanks for any and all help!

[Fire1981]

I think that’s a hand gathered CAC slag that should pop under UV🔥

RAR

[SequoiaBET]

Thanks for the help. However it does not glow at all under UV.