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The coloration is due to the various minerals that are present during fossilization
Seventy million years ago
is the structure of their teeth
1/4 to 3/4 inches in size
which tells us about the osteology of these ancient animals
Aragonite, 35 crystals per flat Compsognathus The coloration is due to35 Specimens of Argonite Per Flat In 2x2 Inch Boxes. 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 may be columnar or fibrous,