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Dwarves' Earth Treasures Museum: How to ID Agate Roughs
Mexican Coconuts / Las Choyas Coconuts
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-Typical colors: White, gray, bluish-gray, colorless
-Typical sizes: Any sizes
-Typical shapes: Spherical shape (not always)
-Most distinguishing characteristic: Spherical nodules with "craters" on the surfaces.
-Special Notes: Well known for rare amethyst geodes.