Thanks so much for the info and video link, Shamrock. Very Cool! That helps me to understand the difference between torch made and other techniques. The final marble is gorgeous. Such fine detail in the lattice work!
We are lucky here in Oakland as there is a place called The Crucible that teaches all kinds of industrial arts and also serves as a work space for artists. One of the things they offer is glass work- both torch work and glass blowing. I took a 2 weekend class on torch work a few years back. It was a blast! We made an elephant, an octopus and of course- marbles, among other things. Glass is such an amazing medium to work with. And it's not easy! The amount of work folks put into making hand made marble and other items is awesome. I have much respect for their craft and art. If I had been introduced to it in high school, I totally would have pursued it as a career.
Thanks again Shamrock and all who provided info. I learn so much here!