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Von_von
Joined: 10 Jan 2024
Posts: 3
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Posted: Jan 11, 2024 05:45 Post subject: I need your help! |
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I got this mineral. I know it's quartz. I don't know what the fine yellow crystals could be. Could it be rhodochrosite? Thanks to everyone!
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Volkmar Stingl
Joined: 23 Sep 2012
Posts: 850
Location: Innsbruck
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Posted: Jan 11, 2024 06:00 Post subject: Re: I need your help! |
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I think this is Calcite, not Quartz (test the hardness)! The rhombohedrons could be Dolomite.
Volkmar
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Michael Shaw
Site Admin
Joined: 30 Apr 2008
Posts: 2078
Location: Oklahoma
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Posted: Jan 11, 2024 09:19 Post subject: Re: I need your help! |
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I agree, this looks like calcite not quartz. A simple hardness test will differentiate between these two common minerals. Also, when submitting questions regarding identification, you should always tell us where the unknown mineral is from, if known. This is a great help in ID.
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James Catmur
Site Admin
Joined: 14 Sep 2006
Posts: 1349
Location: Cambridge
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Posted: Jan 12, 2024 02:39 Post subject: Re: I need your help! |
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It looks like Calcite to me too. This post explains how to do simple tests. For hardness if it will scratch glass it could be Quartz, but if glass scratches it then it is probably Calcite
https://www.mineral-forum.com/message-board/viewtopic.php?p=19487#19487
Michael Shaw wrote: | I agree, this looks like calcite not quartz. A simple hardness test will differentiate between these two common minerals. Also, when submitting questions regarding identification, you should always tell us where the unknown mineral is from, if known. This is a great help in ID. |
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