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| Search found 190 matches |
| Author | Message |
|---|---|
 Topic: Large rocks on our property |
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| Josele Replies: 5 Views: 376 |
 Forum: FOR BEGINNERS: What is it? Where is it from? Posted: Sep 21, 2018 18:32 Subject: Re: Large rocks on our property |
| It looks like quartz but I think is not a conglomerate (sedimentary origin) but a boulder of massive quartz related to igneous rocks.
Matt, you can check hardness trying to scratch a bottle glass. ... |
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| Topic: Unidentified vitreous stone |
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| Josele Replies: 12 Views: 666 |
Forum: FOR BEGINNERS: What is it? Where is it from? Posted: Sep 18, 2018 10:45 Subject: Re: Unidentified vitreous stone |
| After seeing this last photo, I would say it looks like an "aura quartz", that's a polished quartz pebble (natural) with a thin metallic exterior layer (artificial).
Polished stones can be ... |
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| Topic: Unidentified vitreous stone |
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| Josele Replies: 12 Views: 666 |
Forum: FOR BEGINNERS: What is it? Where is it from? Posted: Sep 18, 2018 07:08 Subject: Re: Unidentified vitreous stone |
| ... Labradorite is dark green and mostly opaque. This stone is clear and colourless. Labradorescence only occurs in one plane and usually displays shades of yellow, green, and blue. This stone display ... | |
| Topic: Unidentified vitreous stone |
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| Josele Replies: 12 Views: 666 |
Forum: FOR BEGINNERS: What is it? Where is it from? Posted: Sep 17, 2018 20:03 Subject: Re: Unidentified vitreous stone |
| Could be Labradorite. | |
| Topic: Possible slag |
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| Josele Replies: 2 Views: 301 |
Forum: FOR BEGINNERS: What is it? Where is it from? Posted: Sep 16, 2018 17:28 Subject: Re: Possible slag. |
| It seems that there are many bubbles in the lower half seen on first photo that would reveal a glass slag. | |
| Topic: Who to trust with gemstone identification? Are some gemologists better than others? |
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| Josele Replies: 11 Views: 595 |
Forum: Incorrect classification and fakes Posted: Sep 07, 2018 10:10 Subject: Re: Who to trust with gemstone identification? Are some gemologists better than others? |
| ..., I have a piece of Citrine that I wanted to make certain was genuine, and not baked Amethyst. ...
Adrian, some photos of the "citrine" in question will help to know what we are talking ... |
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| Topic: New find ID help |
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| Josele Replies: 10 Views: 807 |
Forum: FOR BEGINNERS: What is it? Where is it from? Posted: Sep 05, 2018 14:33 Subject: Re: New find ID help |
| Another vote for basalt, which usually contains enough magnetite to be attracted by a magnet. | |
| Topic: Unknown rock and mineral?? |
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| Josele Replies: 5 Views: 691 |
Forum: FOR BEGINNERS: What is it? Where is it from? Posted: Aug 22, 2018 14:50 Subject: Re: Unknown rock and mineral?? |
| Welcome to FMF!
Can't see very well the crystals lining the pocket but in the first photo some reflections look like rhombohedral faces of quartz to me. You can check by trying to scratch a glass wi ... |
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| Topic: Could anyone identify this stone? |
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| Josele Replies: 12 Views: 747 |
Forum: FOR BEGINNERS: What is it? Where is it from? Posted: Aug 17, 2018 07:35 Subject: Re: Could anyone identify this stone? |
| Really looks like a piece of flint / chert (sedimentary siliceous rock).
Can check it trying to scratch a bottle glass with it. If glass stays permanent scratched will be as said. Regards. |
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| Topic: Dog tooth calcite from where? |
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| Josele Replies: 8 Views: 505 |
Forum: FOR BEGINNERS: What is it? Where is it from? Posted: Aug 14, 2018 06:39 Subject: Re: dog tooth calcite |
| Size is in mm or cm?
Some testing and a closeup in higher resolution of the blue stuff will help. |
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| Topic: We celebrate the 12th anniversary of the beginning of FMF! |
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| Josele Replies: 19 Views: 1045 |
Forum: Comments & Suggestions Posted: Aug 13, 2018 08:48 Subject: Re: Today we celebrate the 12th anniversary of the beginning of FMF! |
| ... My only suggestion if you can at some point change to vBulletin software
Peter, yes we can post videos in FMF, as is explained here: Now we can add videos Regarding URL and e-mail addresses, th ... |
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| Topic: Favourite Quartzes? |
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| Josele Replies: 38 Views: 18850 |
Forum: Favourite Minerals Posted: Jun 14, 2018 18:00 Subject: Re: Favourite Quartzes? |
| Bob, you are right, many characteristics are not clearly visible in a photo, that's why I like to say "I think that ..."
Is true that high end and fine gwindel specimens usually show both ... |
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| Topic: Favourite Quartzes? |
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| Josele Replies: 38 Views: 18850 |
Forum: Favourite Minerals Posted: Jun 14, 2018 15:47 Subject: Re: Favourite Quartzes? |
| ... As to the question about whether the double crystal immediately above is a Gwindel, I don't think so. The attachment would be on a prism face.I think is not a gwindel precisely because the attachm ... | |
| Topic: I need help identifying these rocks, please. Thank you |
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| Josele Replies: 2 Views: 1076 |
Forum: What is it? - Where is it from? Posted: Jun 07, 2018 08:22 Subject: Re: I need help identifying these rocks, please. Thank you |
| Please try to check some more properties of your sample as explained here: Asking: "What is this? / Where is it from?". Thanks. | |
| Topic: Can someone tell me what this is please. |
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| Josele Replies: 3 Views: 1261 |
Forum: FOR BEGINNERS: What is it? Where is it from? Posted: May 31, 2018 09:23 Subject: Re: Can someone tell me what this is please. |
| Bubbles and color distribution in flow lines show up that it is a not-natural glass. | |
| Topic: Please identify |
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| Josele Replies: 5 Views: 1644 |
Forum: FOR BEGINNERS: What is it? Where is it from? Posted: May 20, 2018 18:32 Subject: Re: Please identify |
| Really looks like glass slag.
Some slags can be so beautiful as to be collected although I think I can say that people in this forum we prefer natural crystals. |
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| Topic: Prospecting pegmatite for schorl: need help. |
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| Josele Replies: 8 Views: 3800 |
Forum: Minerals and Mineralogy Posted: Dec 13, 2017 16:01 Subject: Re: Prospecting pegmatite for schorl: need help. |
| I was wondering if Schorl is more likely to occur in the feldspatic part of the pegmatite outcrop, or rather in the part that has more quartz. ...
In the pegmatites of Cap de Creus area (eastern end ... |
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| Topic: Fluorescent inclusions in quartz |
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| Josele Replies: 4 Views: 1841 |
Forum: What is it? - Where is it from? Posted: Nov 24, 2017 04:20 Subject: Re: Fluorescent inclusions in quartz |
| Maybe hydrocarbons? | |
| Topic: Fluorescent inclusions in quartz |
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| Josele Replies: 4 Views: 1841 |
Forum: What is it? - Where is it from? Posted: Nov 23, 2017 06:54 Subject: Re: Fluorescent inclusions in quartz |
| Which kind of UV source did you use for checking fluorescence?
Long wave? Short wave? |
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| Topic: Questions about microcline |
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| Josele Replies: 6 Views: 2571 |
Forum: Minerals and Mineralogy Posted: Nov 20, 2017 17:35 Subject: Re: Questions about microcline |
| Carlsbad twin? What a surprise! One expect the typical "horns" in a carlsbad twin. After thinking a bit about it, I see that the twin operation is the same but in my specimen termination is ... | |
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