wannabee
starting to spend too much on rocks
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Post by wannabee on Oct 5, 2016 11:20:28 GMT -5
While on vacation at Lake Abanakee this summer, I happened on this really neat rock with rectangular quartz crystals embedded in it. It measures approximately 4x3x2 inches.  |
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Deleted
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Post by Deleted on Oct 5, 2016 13:03:35 GMT -5
Not familiar with the material from that area – could be calcite or a zeolite – but you might take a look at NY State Academy of Mineralogy, as they have photos and listings of minerals from just about every part of the state. |
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ziggy
spending too much on rocks
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Post by ziggy on Oct 5, 2016 19:46:57 GMT -5
While on vacation at Lake Abanakee this summer, I happened on this really neat rock with rectangular quartz crystals embedded in it. It measures approximately 4x3x2 inches. I think that the crystals more resemble calcite. Hit it with a black light. If it's calcite it will glow. |
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Deleted
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Post by Deleted on Oct 5, 2016 23:00:17 GMT -5
Calcite
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ziggy
spending too much on rocks
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Post by ziggy on Oct 6, 2016 7:15:58 GMT -5
Also looks a little like halite. Did you see if it tastes salty?
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Post by Deleted on Oct 6, 2016 9:38:47 GMT -5
Also looks a little like halite. Did you see if it tastes salty? Halite is cubes. Not rhombs. I do encourage licking though! |
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wannabee
starting to spend too much on rocks
Member since September 2016
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Post by wannabee on Oct 6, 2016 9:47:23 GMT -5
No, it is not salty. That was one of the first things I checked. I will hit it with a black light this evening and see if it fluoresces.
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ziggy
spending too much on rocks
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Post by ziggy on Oct 6, 2016 13:48:01 GMT -5
No, it is not salty. That was one of the first things I checked. I will hit it with a black light this evening and see if it fluoresces. Calcite most likely, agreed. Shotgunner. I was looking at the matrix rock attached and it resembles the stuff that salt at the edge of the deposit comes out with. I see what looks like (to my eyes anyway) cubes in there too but, moot point. He says its not salty.  Anyway, I'm not seeing much in the way of this shape either, which is a trigonal rhombohedron. I mean, when you really look at it I'm seeing lots of 90 degree angles and not much else. I honestly from his picture can't really tell what angles are involved exactly. One more point to make though. Not all calcite will fluoresce under a black light. |
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Post by vegasjames on Oct 6, 2016 15:56:05 GMT -5
I also agree with calcire. A drop of vinegar will cause it to fizz if it is.
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wannabee
starting to spend too much on rocks
Member since September 2016
Posts: 188
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Post by wannabee on Oct 6, 2016 21:10:33 GMT -5
Ok, An update, following the suggestions of you more knowledgeable folks.
No, the crystals do not fluoresce. They do not taste of salt. They do not fizz with vinegar. They are translucent. Upon closer examination, I see they are not 90° terminations, but have a bit of an angle to them.
There are more photos in this album: imgur.com/a/8WOhf
Thank you for the suggestions. For now it is my mystery rock and an oddity among the numerous chunks of granite of every sort I brought home from that vacation.
Regards,
Matt
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Post by vegasjames on Oct 6, 2016 21:42:12 GMT -5
Only other thing I can think of would be a feldspar.
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Deleted
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Post by Deleted on Oct 7, 2016 8:31:05 GMT -5
No, it is not salty. That was one of the first things I checked. I will hit it with a black light this evening and see if it fluoresces. Calcite most likely, agreed. Shotgunner. I was looking at the matrix rock attached and it resembles the stuff that salt at the edge of the deposit comes out with. I see what looks like (to my eyes anyway) cubes in there too but, moot point. He says its not salty. Anyway, I'm not seeing much in the way of this shape either, which is a trigonal rhombohedron. I mean, when you really look at it I'm seeing lots of 90 degree angles and not much else. I honestly from his picture can't really tell what angles are involved exactly. One more point to make though. Not all calcite will fluoresce under a black light. Upper right crystal looks exactly like the image you thoughtfully provided. wannabee, I wonder if you have access to spool/spa acid? |
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wannabee
starting to spend too much on rocks
Member since September 2016
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Post by wannabee on Oct 7, 2016 9:38:49 GMT -5
Muriatic acid? Yep, I've got ready access to it.
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ziggy
spending too much on rocks
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Post by ziggy on Oct 7, 2016 17:06:56 GMT -5
Only other thing I can think of would be a feldspar. This dude might be on to something. Especially since you were finding granite. I think I qualified my statement when I included this "I honestly from his picture can't really tell what angles are involved exactly." I still cant see the rhomb you mention from that picture but I was never really good at spatial stuff anyway. He has however, graciously endorsed your not 90 degrees but some other angle statements so I will bow out at this point. |
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Deleted
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Post by Deleted on Oct 7, 2016 19:58:36 GMT -5
Muriatic acid? Yep, I've got ready access to it. One drop fizzes heavily. ziggyAngles can be deceiving. Muriatic acid confirms or denies calcite! |
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wannabee
starting to spend too much on rocks
Member since September 2016
Posts: 188
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Post by wannabee on Oct 11, 2016 16:44:13 GMT -5
Real life got me busy, but I had a chance today to test with muriatic acid. Yes, it fizzes quite heavily.
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Deleted
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Post by Deleted on Oct 11, 2016 18:19:45 GMT -5
Real life got me busy, but I had a chance today to test with muriatic acid. Yes, it fizzes quite heavily. Calcite |
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Post by nowyo on Oct 12, 2016 1:05:03 GMT -5
In that area, calcite would be most likely. Would be interesting to know, however, where in the Indian Lake area it was found? There is some interesting geology around there. Haven't been there in almost 30 years, and with any luck will never be there again, the last time there we were bear hunting on Floodwood Mountain.
Russ
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wannabee
starting to spend too much on rocks
Member since September 2016
Posts: 188
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Post by wannabee on Oct 12, 2016 8:03:28 GMT -5
In that area, calcite would be most likely. Would be interesting to know, however, where in the Indian Lake area it was found? There is some interesting geology around there. Haven't been there in almost 30 years, and with any luck will never be there again, the last time there we were bear hunting on Floodwood Mountain. Russ From Floodwood, it is about 60-ish miles south to the northernmost point of Indian Lake. Follow the river a bit further north and you'll come out on Lake Abanakee. The rock was found off a dirt road on the eastern shore of Abanakee about mid way up the lake. So I would guesstimate I found it 50 miles south of the Floodwood area. |
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