Size is as-packaged, or the diameter of loose marbles. ("D" is the diameter of round items other than marbles.)
The Vortex style makes use of optical properties of the glass to create a startling optical illusion. The lower half of the sphere contains a sparkling rainbow-colored whirlpool of dichroic glass. The top half of the marble acts as a magnifying glass. Together they combine to form the "Vortex," a striking illusion in which the top half magnifies the vortex in the lower half, making it appear to spiral deeper than the marble is wide - lower than our brain tells us is possible! Dichroic glass is a modern composite glass made by stacking layers of glass and micro-layers of metals or oxides; this gives the glass shifting colors depending on the angle of view, causing an arraw of colors to be displayed. Jason has been making vortexes since 2002 and has become an expert at the style, his marbles are very bright and colorful and perfectly round. They are all signed and dated by the artist.
This work will be custom made to order, may vary slightly from the example(s) shown & will ship separately from the rest of your order direct from the artist. Please allow up to 4-6 weeks for delivery.