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Can you please help me identify this mineral? (SOLVED)

+3 votes

Black, with white streaks, and a large groove. Found on the beach in Livorno, Italy.


Update:This is Cryptocrystalline Radiolarite chert, fossil radiolarians..

asked Dec 25, 2017 by mandua (670 points)
edited Mar 5, 2018 by mandua

4 Answers

0 votes
well looks pretty interesting
answered Dec 27, 2017 by manuelaaumick (430 points)
Update: I found out what it is: Cryptocrystalline Radiolarite chert - or radiolarian (microscopic marine animal) fossils.
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0 votes
I'm thinking a quartz/basalt mix.
answered Dec 31, 2017 by Weasel (58,940 points)
It is not basalt, it is radiolarite - I just found out: Cryptocrystalline Radiolarite chert. The white streaks are indeed quartz.
0 votes

I observed this piece of quartz and noticed what gave the impression of graphite on a aspect. I regarded into it, and I do not assume it is graphite, however molybdenite, or in all likelihood silver. Does each person have an idea what it is probably?Online Essay Writing Service UK


answered Jan 4, 2018 by edwardmyers (140 points)
I researched more thoroughly and it turns out this is cryptocrystalline quartz radiolarite chert. basically fossil radiolarians (microscopic marine creatures). but thank you for your answer.
0 votes

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answered Mar 14, 2018 by watsonjohn759 (140 points)