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Geology/Rock I bought

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Question
rock
rock  

rock3
rock3  
I found a rock at a yard sale, it seems to have square crystals.
It also contains Iron Pyrite. Around the edges is a magnetic black material. The crystals are a green to blueish green.

Any Idea what I bought?

Answer
Dear Sir
Visuals of image indicates rock consist of plagioclase minerals-may be -igneous rock
Rock is aggregate of natural minerals-Pyrite iron are secondary minerals added into rock
Hoverer hand specimens are to be tested for further confirmation-Consult geologists
Dr D.Venkat Reddy
Professor of Geology
Editor- in -Chief -International  Journal of  Earth Sciences&Engineering -IJEE

Published by=(Cafet Innova Technical Society -CITS- Hyderabad-AP-India)
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Department of Civil Engineering
National Institute of Technology,Karnataka,(NITK)
Surathkal,Srinivasanagar-575025,Mangalore-D.K,India

Geology

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Dr D.Venkat Reddy

Expertise

Engineering Geology,Mining geology,commercial petrology,Decorative and dimensional stones,Hydrogeology

Experience

20years texhing and reserch expireience in geology,enginnering geology for graduate and undergraduate students-reserch guidance,10years field exoireience conducting field camps for geology students=Presently Assistant professor in geolog

Organizations
NITK-National Institute of Technology,Surathkal,Mangalore-DK,India Geology section Dept of Civil Engineering

Publications
published 70 research papers.( 4 books)- Editor in Chief-International Journal of Earth Sciences and Engineering -1.Engineering Geology for civil Engineers-oxford &IBH pub-1996] 2.Decorative and dimensional stones of India-CBS Pub-1997 3.Engineering Geology-Vikaspublishers2010 4.Applied Geology-Vikaspub-2010

Education/Credentials
MSC(GEOLOGY),Osmania university,India, MSC(Tech )Hydrogeology,OU,India PhD(GEOLOGY)OU,India

Awards and Honors
Distinguishing Indian Award Editor in chief-International Journal of Earth Sciences and Engineering (www.cafetinnova.org)

Past/Present Clients
PRESENTLY WORKING =Professor of Geology-Dept of Civil Engineering NITK-INDIA

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