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.)
This marble is perhaps the nicest handmade I've seen in this price-range. A rarely-seen translucent blue glass forms the background for a white floral motif. White five-petaled flowers bloom on a winding green vine. Each petal is hand-raked to a point, lending an exotic appearance to the blossom. This is all enveloped in a crystal clear layer of glass.