They look like miniature version of "Mexican Coconuts"
with Laguna agates in them. The range of colors and fine bandings in those
agates can make them be confused as Laguna Agates. Like the Mexican Coconuts,
I have came to believe that they may be actually the weathered agate cores
of fully expanded thundereggs and the rhyolite shells still attached to
the Trancas Geodes provided some good evidence on that idea. Althrough
it is rare for me to encounter the "Snowball" agates, they are almost always
small and appear to come in quite a wide range of colors. There is another
type of agate that can be confused with Snowball Agates are pinkish Surprise
Geodes which are usually hollow lined with agatized quartz & barite
pseudomorphs and it is common to see Snowball agates be mixed with Surprise
Agates because of their similar appearances. The possible difference would
be that Snowball agates tend to show bluish agate on surface while the
Surprise Geodes coming with pink to orange colors.
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Rough Appearance: Looks like "Mini-Mexican Coconuts" with multiple
ridges and "squashed look"
Blue-skinned agates are qutie colorful with"Laguna-Like" banding,
Can be confused with "Surprise Agate" which is pinkish geodes with
barite & quartz psuedomorphs
