Experimental triple spiral marble - experimental slight second

Bit of an unusal one, a totally experimental marble, there really is only one of these! Does have some flaws, but its such an interesting one seems a shame to leave it without a home. Inside there are three vortex spirals or gold dichroic which spiral down into the marble before joining at the bottom. I've used a higher quality dichroic for this which shifts from green gold to orange/copper gold, and backed it with a black glass that has a lovely subtle sparkle. Includes a free acrylic stand. This does have some air bubble and bubble lines, and imperfections
The marble is just a touch under 44mm/1.73 inches across. For my marbles I use high quality laboratory grade borosilicate (often known by the 'Pyrex' trade name) which is ultra clear to help create lenses & the optical illusion of space and distance. As this is handmade glass there may be some surface imperfections and/or bubbles in the glass