Metallic blue silver marble with black patterns

[Alta]

I initially mistakenly added this one to the solid color pile, but noticed the black just as I placed it there.

 

First photos were taken in the sun - can almost not make out any patterns. The others were taken with flash. 

Any help in identifying this one please? 

[Steph]

When I see that oily iridescent finish, I think Vacor or Asian.

There are some dark iridescent ones here:  

https://www.billes-en-tete.com/liste_billes.php


Possibly the Steely Torpedo? I don't have any so I can't check to see if they have anything hidden under the finish.  

 

[Alta]

Thanks! 

 

I am definitely going with Vacor on this one.