CHARACTERISTICS | |
Weight | 55 gr |
Size | 60x50x15 mm |
Reference | 200803478 |
Mineral | fossil Ammonite |
Category | Objects and fossils |
Group | Fossils |
Country | Madagascar |
Formula CaCO3] AMMONITE | |||
O | Oxygen | Other no metal | |
Ca | Calcium | Alkaline earth metal | |
C | Carbon | Other no metal | |
Ammonite is not a mineral strictly speaking, but rather a fossil. Ammonites are extinct sea creatures that belonged to the order Cephalopods, just like today's octopuses and squid. Their spiral shells, which are the fossilized part we can see today, were composed mainly of calcium carbonate in the form of aragonite, with traces of other minerals. Ammonites lived during the Mesozoic era, between 240 and 65 million years ago. Their size varied considerably, ranging from a few millimeters to more than two meters in diameter for the largest. The fossilized shells of ammonites can have a wide variety of patterns and colors, depending on the minerals present during fossilization.
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