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-Typical colors: Red, white, purple,
yellow, colorless, often strong colored.
-Typical sizes: 2
to 12 centimeters, rarely larger.
-Typical shapes: Rounded to oval,
sometimes domed.
-Most distinguishing characteristic:
Strong colors, "Entrance tubes" are common, has smooth exterior surfaces.
-Special Notes:
Some coyomito nodules contain pseudomorphs (agate replacing calcite/aragonite
crystals).