Debate and discussion of any biological questions not pertaining to a particular topic.
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These aren't major names of crystals so far as I'm concerned. To me. the "major names" would be the seven major crystal classes: triclinic, monoclinic, orthorhombic, trigonal, tetragonal, hexagonal/rhombohedral, or cubic. I gather the crystals you mention have something to do with plants. The first two at any rate are crystalline deposits of calcium salts found in some plants. What's so special about them I couldn't say.
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