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Post by captbob on Oct 15, 2016 4:41:19 GMT -5
Welcome to the forum!
I'd go with jade too, but I'm not a jade expert. Others will be along to chime in soon. Where you found this would help.
The photos are just the right size - good job.
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wampidytoo
has rocks in the head
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Post by wampidytoo on Oct 15, 2016 5:25:05 GMT -5
I agree with Bob that it does have a bit of a jade look but it has some dissimilar fractures and it is not possible to tell from a photo. Does it feel heavier than other rocks of similar size? The translucence of the lower left corner rules out a lot of other jade wannabees (imitations). Use a hammer to try to take off a small chip on the edge. If it is jade it will be very difficult to get a piece off but if a piece does come off the break will be uneven and not smooth.
If it is jade rush out and find all of it because it is a sweet find but if it is not jade it looks like it would polish up and be a beautiful other stone. Jim
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Sabre52
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Post by Sabre52 on Oct 15, 2016 6:24:20 GMT -5
Nope, not jade. fracture is wrong. Quartz mineral kind, jasper or maybe even glass slag....Mel
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Post by captbob on Oct 15, 2016 9:12:12 GMT -5
And.... poof - all her posts are gone! Was it something we said?
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xia
off to a rocking start
Member since October 2016
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Post by xia on Oct 15, 2016 9:16:53 GMT -5
And.... poof - all her posts are gone! Was it something we said? Oh it was just a pitchstone haha. I wanted to delete the post but it doesnt work. U guys are perfect. It was my fault. Sorry for wasting everyone's time.
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Post by captbob on Oct 15, 2016 9:24:04 GMT -5
I had to Google pitchstone
Pitchstone is a dull black glassy volcanic rock formed when a felsic, viscous lava or magma cools quickly. It is similar to obsidian but is defined by the International Union of Geological Sciences as having a higher water content. ... pitchstone has a resinous lustre, or silky in some cases, and a variable composition.
So like obsidian. That's something we are all interested in! Bet it can be tumbled then.
What other rocks do you have there in Romania?
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xia
off to a rocking start
Member since October 2016
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Post by xia on Oct 15, 2016 9:49:28 GMT -5
I had to Google pitchstone Pitchstone is a dull black glassy volcanic rock formed when a felsic, viscous lava or magma cools quickly. It is similar to obsidian but is defined by the International Union of Geological Sciences as having a higher water content. ... pitchstone has a resinous lustre, or silky in some cases, and a variable composition. So like obsidian. That's something we are all interested in! Bet it can be tumbled then. What other rocks do you have there in Romania? Well, you know, mountain rocks :-? Geology is very underrated here. Everybody cares about gold. Short, i have no knowledge on anything meaning rocks. I was just curious
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Fossilman
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Member since January 2009
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Post by Fossilman on Oct 15, 2016 9:57:14 GMT -5
And.... poof - all her posts are gone! Was it something we said? Oh it was just a pitchstone haha. I wanted to delete the post but it doesnt work. U guys are perfect. It was my fault. Sorry for wasting everyone's time. Not wasting anyones time,that's how we all start out........Pretty soon,you will be ID'ing other rocks for other people too... Welcome to the forum ...
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Post by 1dave on Oct 16, 2016 8:49:08 GMT -5
And.... poof - all her posts are gone! Was it something we said? Oh it was just a pitchstone haha. I wanted to delete the post but it doesnt work. U guys are perfect. It was my fault. Sorry for wasting everyone's time.
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xia
off to a rocking start
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Post by xia on Oct 16, 2016 8:57:00 GMT -5
Just pitchstone? That is the stuff the famed Spencer Idaho Precious Opal formed in! [/div] [/quote] That's beautiful but what does it have to do with pitchstones?
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Deleted
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Post by Deleted on Oct 16, 2016 9:06:06 GMT -5
Just pitchstone? That is the stuff the famed Spencer Idaho Precious Opal formed in! That's beautiful but what does it have to do with pitchstones? It's the matrix the opal was formed in. This example is quite beautiful. Maybe yours is not? I never saw it.
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xia
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Post by xia on Oct 16, 2016 9:19:38 GMT -5
That's beautiful but what does it have to do with pitchstones? It's the matrix the opal was formed in. This example is quite beautiful. Maybe yours is not? I never saw it. No. Mine are green
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Deleted
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Post by Deleted on Oct 16, 2016 9:26:08 GMT -5
It's the matrix the opal was formed in. This example is quite beautiful. Maybe yours is not? I never saw it. No. Mine are green Quite nice, and definitely not jade. Thanks for reposting pics. And welcome to this extended and largely functional family.
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Post by 1dave on Oct 16, 2016 11:09:30 GMT -5
Pitchstone is a coarse obsidian.
The Spencer material had so much silica in it that spheroids formed in it, and on cooling and contracting the water content slowly ruptured them 9into "Thundereggs." The later hot springs filled them with the opal.
I would be interested in knowing what element provided the green in your material. It could be a jasper.
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metalsmith
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Post by metalsmith on Oct 16, 2016 11:26:31 GMT -5
There's a good description of the characteristics of pitchstone here: linkThe sample in discussion above appears to be Type 2, with small phenocrysts of (I assume) white orthoclase feldspar - there are some right-angles visible in the fracture faces. How big are they (the white crystals)?
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Post by 1dave on Oct 16, 2016 12:00:39 GMT -5
I like the green color. Yours looks to be closer to the obsidian end, knappable and therefore lapidary material. With even more water it would have become - Apache Tears are dryer obsidian nodules surrounded by perlite.
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Deleted
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Post by Deleted on Oct 16, 2016 13:40:39 GMT -5
The fracture on that doesn't look obsidian-like to my eye. Looks more like a green porphyry basalt.
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Post by 1dave on Oct 16, 2016 13:49:38 GMT -5
The fracture on that doesn't look obsidian-like to my eye. Looks more like a green porphyry basalt.
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