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care and feeding of worms
doesn’t mean you’re limited to a bottle and a mixer
3/4” approximate size
and even meteorites
Prehnite astronomy book care and feeding of wormsPrehnite is a calcium aluminum silicate with the chemical composition Ca2Al(AlSi3O10)(OH)2. It generally occurs as volcanic cavity infillings, and typically is a shade between yellow and green, however colorless and blue specimens are not unheard of. The stone has a soft, velvety look to it. Prehnite as a species seems to rarely form what we would call "sharp, discrete crystals" as opposed to gorgeous ball like aggregates and rolling plates. When they
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