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Identity HelpOutrageous blues and greens, highly translucent

19th Feb 2020 23:15 UTCPaul Markham

The video does not do this specimen justice.
Any help identifying would be appreciated. 
Pulled this from a section of northern California coastline. 
Very heavy.
intense blues and greens throughout.
Fractures to a razor edge when broken.
Stone was wet for video.

20th Feb 2020 02:02 UTCGregg Little 🌟

A test or two would be very helpful like hardness but where you describe it as breaking with razor edges would suggest quartz. You might also check for effervescence in case there is a carbonate in the rock.

The over all texture seems to be a chert pebble conglomerate.  The rounded blue and green chert clasts are in a brownish finer (mud?) matrix.  The broken surface doesn't give the pebbles any relief so it appears the whole thing is silicified.

21st Feb 2020 23:47 UTCMatthew Droppleman

Give it a good scrub!
 
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