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Dugway Nodule
Name:
Dugway Geode
Other Name:
Dugway Nodule
Pronunciation:
duhg wey noj-ool]
Type:
Volcanic Rhyolite
Classification:
Rhyolitic thunderegg, Volcanic
Luster:
exterior is dull, interior glassy
Chemical Formulation:
silica dioxide (SiO2), and Potassium Oxide (K2O)
Fluorescent:
Some
Mohs Hardness:
6.5 - 7
Color:
dull brownish-gray exterior, interior shades of white, gray, light blue, purple or pink
Fracture/Cleavage:
conchoidal fracture
Uses:
Decorative display, jewelry making
Key Features:
cavities lined with white, clear, or amethyst quartz, alongside banded agate, typically ranging from 2 to 4 inches in size.
Sources:
BLM
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