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Chalcedony Var Sardonyx Psm Fossil Coral

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CLB517811

Chalcedony Var Sardonyx Psm Fossil Coral

Pseudomorph

Description Tabs

Description
Locality: 
Tampa Bay, Hillsborough County, Florida, United States of America
Class: 
Massive/Crystalline
Size Range: 
Museum (18cm plus)
Size: 
20.2 × 18.5 × 5 cm
Description

A wonderful, complete fossil coral specimen, replaced by black, dark brown and white banded sardonyx. The specimen has been sawn through the middle, the surfaces polished. I measured the width putting the two pieces close together. Height and depth is the largest of the two.

You rarely get a nice pair like this nowadays.

Mineral Data
What's on the rock

Chalcedony

Variety Of: 

Quartz

Formula: 
SiO2
Strunz: 
4.DA.05
Hardness: 
7.0
Hardness: 
6.5 - 7.0
Streak: 
White
Type Locality: 
Kadıköy (Chalcedon), Istanbul Province, Marmara Region, Turkey

Sardonyx

Variety Of: 

Agate

Formula: 
SiO2
Hardness: 
0.0
Hardness: 
0.0

Coral

Variety Of: 

Animal

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