Da Roberto

X2

Yes, it could be part in my opinion ...

Here is the Heaton that could resemble the op, but the base of this seems opaque, (even the blue seems to be different) while that of Heaton is always translucent "rotten robin egg"

Akro slag can also have straight cutting lines, generally shorter than cac. I'm more for Akro here....

All Raven

The first could be the Champion, the second yes, Master

Many jabo for me

I think of jabo

In part, I agree with this

Well, the base of mine is a bit different, but the structure looks like that... (I think there are several fractures in the op)

The big one is a Bulgarian handmade, I have a similar one, ... then I will post photos ....

Yes, ghosts are more stringy

No ox blood, to the right vitro "buttermilk" I think

I think they are all Akro, except the first one?

Vitro for me too

Heaton for me

Yes Alley

Mmmmh.... Gold is very beaten, but I don't think it contains lutz.

Master

I agree, I also see this possibility

Each company had its own particular structure / motif in the construction of marbles, although they could be very similar to each other, such as Heaton and Cairo Some reasons may be distinguishable for a particular company, so what is certain, others (in the case of the third and fourth photos above) are just feelings that you can have Sensations, for the structure of the swirl and in the way it swirls, already seen in that particular company but, without being completely sure

The one at the bottom, blue, with white veins should be a wirepull veiligglas ( Olanda Amsterdam)

Yes, there can be different variations with similar shades, this is the first that came to my hands,.... now

You are welcome, also possible Heaton here

Heaton for me I have similar, very beautiful with that black cherry