Radioactive Uranium Doped Marbles Small Uranium Doped Glass Marbles under normal light Small Uranium Doped Glass Marbles under Ultraviolet light (Blacklight) Radioactive Uranium Doped Glass Marbles,...... more info
Helenite Eruption of Mt. St. Helens on May 18th, 1980 Green Obsidianite, coloquially known as Helenite, is glass fabricated from the ash of the infamous Mt St. Helens Eruption. This unique glass was discovered while...... more info
Radioactive Uranium Doped Marbles Large Uranium Doped Glass Marbles under normal light (small marble shown for size comparison) Large Uranium Doped Glass Marbles under Ultraviolet light (Blacklight) Radioactive Uranium Doped.... more info
FLUORESCENT Helenite Eruption of Mt. St. Helens on May 18th, 1980 NEW! Ultra-rare Fluorescent Helenite. These marbles contain traces of naturally occuring fluorescent minerals such as Uranium. A must-have for all collectors! Green...... more info
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