Would like slightly larger pix if possible
Am I seeing a seam in pic #3 for the first marble? Sorry, the pic is small and dim and I can't make it out. I'm leaning toward Master if it has the small cutlines that I think I see a hint of.
For the second marble, it looks like the first three pics are mostly the same view. Is that a small cutline on those? I'm leaning Akro Slag on it, but more views could change my mind. If slag, then it's official name would be "Onyx" or I suppose it could be "Striped Onyx" but I don't recall exactly when that name was used.