I think your marble site is wonderful. I am so pleased to be able to find real rock crystal marbles. I use them in jewelry making. Finding 1/2" to 3/4" undrilled rock crystal beads has been nearly impossible. I'm glad I finally found a source.
Size is as-packaged, or the diameter of loose marbles. ("D" is the diameter of round items other than marbles.)
Globe-like transparent blue clearie printed with 22K gold continents! Portion of this sale will be donated to environmental & educational foundations. This is recycled glass, do not expect flawless glass. Rough handling will cause gold to flake.