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Growths of sphalerite and hints of dolomite are "studded" across the surface resulting in "star points" bursting from the calcite effect
CALCITE AND ANKERITE
Huaron Mines
Couer d'Alene District
AMETHYST QUARTZ
Agatized Coral Fossil (Florida) Mt. Antero Growths of sphalerite and hintsAGATIZED CORAL FOSSIL Tampa Bay Florida Each Side Apx. 6. 8 x 2. 75 x 1. 2 Inches 17. 5 x 7 x 3 Centimeters Cabinet Ancient fossilized coral from the Eocene to Miocene age Approximately 25 million years old! The ancient coral reefs in the area now known as Tampa Bay were buried under layers of sediment carried in by riverways. From Rock&Gem: Florida agatized corals are the skeletal remains of colonial animals, known as anthozoans, that died 25 to 38
