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Post by susand24224 on Sept 4, 2010 21:29:29 GMT -5
I sure would be pleased if someone knows what this rock is, or just as important, what wil happen if I slab it. It was found on the coast of Washington, a "beach rock", so time, waves and sand may have enhanced its apparent porosity. The ridges in the rock are raised, and look almost like a webbing in person. It is a dull faded sage green, with flecks of black and white. It is somewhat porous, the ridges being less so--about six inches across. Thanks for any thoughts! [ ][/img]
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Post by jakesrocks on Sept 4, 2010 22:03:02 GMT -5
Don't have a clue what it might be, but before you waste time cutting it, you might try polishing a small window. If it polishes, it's worth cutting. Don
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Sabre52
Cave Dweller
Me and my gal, Rosie
Member since August 2005
Posts: 20,466
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Post by Sabre52 on Sept 4, 2010 22:46:04 GMT -5
Pretty cooling looking stone. Could be a serpentine slick. Those are fairly common on Pacific beaches. If so, you should be able to scratch it with a knife but really hard to tell what you have until you can show the inside....Mel
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Post by susand24224 on Sept 5, 2010 0:33:25 GMT -5
Yes, it scratches with a knife, or rather, parts of it does. The dark flecks do not, but the ridges and main body do. It is different from the other serpentine I have encountered here, but this is the first piece I have picked up that is wave worn. I will likely sacrifice a small piece on my next trim saw day.
Thank you to both of you for your thoughts.
Susan
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Post by Woodyrock on Sept 7, 2010 0:28:59 GMT -5
Susan:
An accurate identification of this one is the rockhound term PGR (Pretty Green rock). Like Mel said most likely a serpentine slick, but still a pretty garden rock. Woody
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Post by susand24224 on Sept 7, 2010 10:29:49 GMT -5
Thank you, Woody. I recall the terminology similar to PGR from my bird feeder watching days and the LBJs (Little Brown Jobs).
Susan
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