I got nothing here

[HNJ]

Something foreign maybe? About 5/8”. No real cut line that I can see.

[Steph]

I"m going to say contemporary torchmade marble.  It certainly has something odd going on. 

[wvrons]

Correct definite newer torch made. 

[Berryb]

Surprising that someone would go to that trouble to make a 5/8ths marble. It also looks a little played with, also kind of surprising for contemporary  "art". Thanks

Bruce

[wvrons]

Bad copy of CAC with similar color combination. Look at all the little circles where the base color shows through the yellow color lines. This is heat from a torch a little to hot making gas bubbles and the surface color flowing away. Many times it is on a edge of color. The edge of the color is thinner and just a little to much heat makes it flow away, making holes where the base glass shows through the hole. They can be round or egg shaped, usually darker around the edge and can also be in small groups.  Plus the swirl pattern is totally wrong, especially the twist on the left of the 3rd picture. The cut line in the 2nd and last picture is totally all wrong. Every picture shows definite contemporary poor torch made copy of a CAC. 

[Berryb]

When I first saw the OP marble I thought "hey I have one that looks like that". After reading wvrons last post I thought I would post pics of it. I always assumed it was a CAC wannabe. Thanks

Bruce

[Steph]

Bruce, yours looks like a legit old marble, but I don't know whose.

[wvrons]

That is a WV swirl. Probably Ravenswood. All the WV swirl companies made these dark purple and white swirls. If you check close some are not purple but actually can be brown or green instead of purple. Some get very dark and look almost black. The white swirling with these, some have more opaque or solid than others. Some  the white swirl has more sharp tips or like flame tips. Some have the hooks and tight switchbacks with the white. With some the white swirl stays on the surface more and some the white dives inside and out. Some can be separated and some cannot. If you put 6-10 together then you will notice differences in them. Then it is learning which trait belongs more to one company over the others. They are difficult to separate, which is a reason the value is low on these and plus there are so many available.