Benathema
has rocks in the head
God chased me down and made sure I knew He was real June 20, 2022. I've been on a Divine Mission.
Member since November 2019
Posts: 703
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Post by Benathema on Oct 11, 2020 22:24:11 GMT -5
We've nicknamed these "snow-capped peaks" and they're really neat. They appear crystalline, but not in the hexagonal way like quartz, more fibrous looking where the fibers appear to distribute radially from some origin. It's fairly hard, tumbles well, takes on a good shine, and flashes like Tiger's-eye (the white part). We've found them in the Kalama and Lewis rivers. Here's a few pieces of rough before I tossed them in the tumbler. Here are some different ones I tumbled last year. Anyone have any idea what this stuff is?
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Post by amygdule on Oct 11, 2020 22:50:39 GMT -5
Zeolites, maybe NatroliteThose look like nice ones. I find them occasionally on the Oregon Coast. The solid ones seem to polish well with nice chatoyancy.
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thecrystalisle
starting to spend too much on rocks
Member since October 2020
Posts: 142
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Post by thecrystalisle on Oct 12, 2020 20:05:56 GMT -5
Looks like scolecite to me but don't quote me on it. Very incredible tumbled pieces you have there. gorgeous
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Post by amygdule on Oct 12, 2020 21:26:31 GMT -5
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polaszko
having dreams about rocks
Member since August 2020
Posts: 58
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Post by polaszko on Oct 14, 2020 19:36:57 GMT -5
As I read on Mindat.org big natrolites are known from Lewis Co. and Cowlitz Co. but fammiliar minerals like okenite, thomsonite, gyrolite and scolecite also, so we still don't know what this stones are. Almost for sure as amygdule said these are zeolites.
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Benathema
has rocks in the head
God chased me down and made sure I knew He was real June 20, 2022. I've been on a Divine Mission.
Member since November 2019
Posts: 703
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Post by Benathema on Oct 15, 2020 11:17:05 GMT -5
Yea, from looking at images the other night after a few suggestions had been made, narrowing down what zeolite it is from visual alone is still a challenge. Silky and fibrous was a description for many of them.
Hardness of 5-5.5 for many of these is right on that edge of being able to pull off a polish in the rotary using "normal" techniques.
Then there's the matter of whether each one of these we pick up, whether or not it's the same zeolite for each of them.
So I guess "some sort of zeolite" is the answer for now. Which is cool by me.
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Post by jasoninsd on Oct 15, 2020 20:59:39 GMT -5
Wow! Those two you tumbled last year are gorgeous!
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