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Ammolite

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CLB158632

Ammolite

Pseudomorph

Description Tabs

Description
Locality: 
Mitsinjo, Boeny, Madagascar
Size Range: 
Miniature (4.5-7 cm)
Size: 
6.2 × 5 × 1.9 cm
Description

An 'opalized' ammonite. Ammolite is a pseudomorph of aragonite after biogenic aragonite (the ammonite shell) and can include quartz and calcite plus many elements like iron, magnesian, copper, chrome, aluminium, strontium, titan and more in micro traces. There is no water in ammolite (like in real opal); the color and iridescence is caused by interference in the micro layers of the material. In daylight this 'ammolite (also calcentin or korite) ammonite' shines very brightly in cherry to wine-red with traces of purple, green and golden yellow. Almost all parts of the shell seem to radiate with color, much more and better than the camera can show.

Mineral Data
What's on the rock

Ammolite

Variety Of: 

Ammonite

Hardness: 
0.0

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