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Question
rock or mineral
rock or mineral  
what is this rock or mineral

Answer
Dear Mr Danny, Goodmorning and Fraternal Greetings!

The specimen you are showing is not clear,it is very difficult for me to identify in a small image,  however I can guess it is a rock or stone. Always make it a point that rock is an aggregate of minerals, that means one or more minerals will be present. Probably it is also may be a chert or chalcedony, which belong to quartz group of rocks.

with regards

Dr. D S Subrahmanyam

Geology

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Dr D S Subrahmanyam

Expertise

All questions related to Geology, Geotechnical Engineering (especially in-situ stress, in-situ Deformability and Shear investigations) required for underground tunnels and excavations, Dimensional Stone Mining. Can't answer Soil dynamics related to Geotechnical Engineering

Experience

Geology and Geotechnical Engineering and Dimensional Stone Mining

Organizations
National Institute of Rock Mechanics (Govt of India)

Publications
International Journal of Mining Engineering and some other Indian journals

Education/Credentials
Doctorate in Geology

Awards and Honors
Reviewer for 3 International Journals

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