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Posters are unframed
The ancient bison
Of the many copies of the Archaeopteryx specimen available
" - Jeff Meldrum
Only in oblique light do the Haarlem specimen's feather imprints show up at all
Aragonite Crystals Deinonychus Posters are unframedNOTE THAT YOU WILL RECEIVE A SPECIMEN OF EQUAL OR BETTER QUALITY THAN THE ONE SHOWN Aragonite is a carbonate mineral, one of the two common, naturally occurring polymorphs of calcium carbonate, CaCO3. The other polymorph is the mineral calcite. Aragonite's crystal lattice differs from that of calcite, resulting in a different crystal shape, an orthorhombic system with acicular crystals. Repeated twinning results in pseudo hexagonal forms. Aragonite