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Post by broseph82 on Dec 19, 2014 13:12:46 GMT -5
Have a buddy in WA state right now and asked if he would get me some rocks. Here's a couple pics he sent as an example of what he got me: Second one looks like a pudding stone or conglomerate but what is the first?
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Post by broseph82 on Dec 19, 2014 19:02:23 GMT -5
Bump. Anyone?
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Deleted
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Post by Deleted on Dec 19, 2014 19:26:19 GMT -5
Could be many things.
Scratch tests, acid test, specific gravity, streak test all will help reveal your treasure's true identity.
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Post by Peruano on Dec 20, 2014 9:47:51 GMT -5
Your buddy has the right concept at least so encourage him if you can afford the postage. No. 1 with all the contrast of white stripes with the black matrix will make for each cab being different and some being quite striking. Fun to cut and it should polish to reasonable luster. What is is? Could be quartzite, could be any of the amphiboles (with quartz lines). Just guessing - like Shotgunner says, need data. No. 2. could be a conglomerate or a porphyry - again either way, it will be interesting to cut and quite a lot of contrast. Its a composite so its id also will depend on which slice and closer examinations of the individual components. Learning to read rocks and identify them is a slow process and working with rocks like these will further that process for you. Valuable, no; unusual enough that most of us would give them a look, yes; interesting enough that a rock hound would take them home, probably; fun for you' absolutely. Rockhounding/lapidary, priceless. Merry Christmas. Tom
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Post by broseph82 on Dec 21, 2014 20:04:28 GMT -5
PeruanoGood post thanks. I just thought the black and orange might have been a common rock up there so I thought I'd ask before I got the rock in my possession.
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Post by washingtonrocks on Dec 23, 2014 13:27:42 GMT -5
These types of rocks are super common on Puget Sound beaches. The first one is oceanic basalt (mafic) with quartz veins. Examples from Whidbey Island: In situ: The second is a peridotite (dunite or harzburgite depending on pyroxene present) conglomerate, and likely cemented together with a carbonate (aragonite or calcite). More Whidbey Island examples: For those that love Geology like myself, this is an interesting read on all of the different litholiges that are responsible for the origins of these rocks. www.westerngeohikes.0catch.com/Washington/Whidbey/Whidbey_Island.htmlThanks for showing us yer rocks!
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Fossilman
Cave Dweller
Member since January 2009
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Post by Fossilman on Dec 23, 2014 15:22:43 GMT -5
Some type of basalt and (or) pudding stone too...Will make great cutters for sure,for cabbing..
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Post by Peruano on Dec 27, 2014 8:19:49 GMT -5
Washingtonrocks, That is one cool site for info on Western US Geology (and hikes). I'm going to book mark it and browse it extensively. Thanks. Tom
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Post by washingtonrocks on Dec 27, 2014 13:50:56 GMT -5
Glad you like it Peruano. It might be a little dry for some, but it's an excellent resource!
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Post by broseph82 on Jan 13, 2015 13:27:08 GMT -5
Glad you like it Peruano. It might be a little dry for some, but it's an excellent resource! Cut a couple of slabs off and here's the inside
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Deleted
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Post by Deleted on Jan 13, 2015 22:38:55 GMT -5
I would have lost a $1 bet. I was sure the light streaks inside this stone would have been white. Stained iron yellow outside and unstained white inside. Glad I didn't bet!
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Post by broseph82 on Jan 14, 2015 0:51:25 GMT -5
I would have lost a $1 bet. I was sure the light streaks inside this stone would have been white. Stained iron yellow outside and unstained white inside. Glad I didn't bet! Here's a pair of plugs I've made
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Post by washingtonrocks on Jan 14, 2015 18:26:01 GMT -5
Nice cuts, broseph82! Looks very familiar. VERY Cool you've made plugs out of them!
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Deleted
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Post by Deleted on Jan 14, 2015 18:48:41 GMT -5
core those a coupla more times and you'll will have a rough sphere. A natural marble the size of the core.
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