AMMONITE MATCHED PAIR - BLACK - PROFESSIONALLY SLICED - MOTHER OF PEARL BACK For Sale

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AMMONITE MATCHED PAIR - BLACK - PROFESSIONALLY SLICED - MOTHER OF PEARL BACK:
$75.00

AMMONITE MATCHED PAIR - BLACK - PROFESSIONALLY SLICED - 230417C -MOTHER OF PEARL BACK - IN EXCELLENT CONDITION. THE PAIR WEIGHS 8.7 OZ (252 G) AND EACH HALF MEASURES 4" X 3.5" X 0.25". THE STANDS ARE NOT INCLUDED.
Ammonitesare excellent indexfossils, and linking the rock layer in which a particular species or genus is found to specific geologic time periodsWhy are some ammonites black?The Black coloration is due to changes to the rock formation within the earth after the ammonite was fossilized.It is believed to be the result of infusion of the mineral Manganese into the fossilizing ammonite.