very old rock my great grandpa said had value - Ask Extension
so I have this rock from British Colombia and it was found at Francois lake up in the hills by my grandpa's house and my great grandpa gave it to me 1...
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very old rock my great grandpa said had value #733018
Asked November 02, 2020, 9:14 PM EST
so I have this rock from British Colombia and it was found at Francois lake up in the hills by my grandpa's house and my great grandpa gave it to me 1 year before he passed away it is dark blue has a little bit of red and green in it very noticeable if you know anything that might be valuable on this rock please respond to me.(if you want i can send you a few pictures)
County Outside United States
Expert Response
Hi! I did a little research of BC geology in the vicinity of Prince George and Francios Lake. You have a lovely agate filled thunder egg. Thunder eggs are associated with volcanic rocks, for the most part. In addition to the mineralized areas, the underlying geology is composed of volcanic rocks. This part of the world has also been scoured by huge sheets of ice, known to move vast amounts of rock.BCGS_GF2007-01.pdf This pdf talks about some of the local geology. Looks like a gorgeous area where your family lived. Agate is a form of quartz. Thank you for asking the question. What a great treasure from your great grandpa!
