This cut and polished thunderegg has a dark gray-green chalcedony center running through a tan and brown volcanic matrix. Small dark mineral inclusions are scattered throughout the stone, with natural patterns surrounding the center.
Under 365nm UV light, the chalcedony fluoresces a bright electric blue, creating a completely different appearance from its natural coloring. The polished face shows the internal details, while the outside retains its natural texture.
Size: 3 × 2 ½ x 1
Weight: 6 oz
This cut and polished thunderegg has a dark gray-green chalcedony center running through a tan and brown volcanic matrix. Small dark mineral inclusions are scattered throughout the stone, with natural patterns surrounding the center.
Under 365nm UV light, the chalcedony fluoresces a bright electric blue, creating a completely different appearance from its natural coloring. The polished face shows the internal details, while the outside retains its natural texture.
Size: 3 × 2 ½ x 1
Weight: 6 oz
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