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05 Jun-08:45:41 Re: collection of michael shaw (Michael Shaw)
04 Jun-20:17:45 Re: don lum collection (Don Lum)
04 Jun-15:27:00 Re: the mizunaka collection - stibnite (Am Mizunaka)
04 Jun-08:39:41 Re: collection of michael shaw - malachite (Michael Shaw)
04 Jun-01:49:14 Re: the mizunaka collection (Jordi Fabre)
03 Jun-21:44:21 The mizunaka collection - stibnite (Am Mizunaka)
03 Jun-06:16:31 Re: collection of volkmar stingl (Volkmar Stingl)
02 Jun-13:39:20 Re: don lum collection (Don Lum)
02 Jun-08:51:39 Re: collection of michael shaw (Michael Shaw)
02 Jun-02:27:53 The mizunaka collection - rhodchrosite (Am Mizunaka)
02 Jun-01:36:07 Re: collection of volkmar stingl (Volkmar Stingl)
02 Jun-01:17:41 Re: is this a rhyolite matrix with calcite and smoky quartz? (Volkmar Stingl)
01 Jun-22:11:04 Re: is this a rhyolite matrix with calcite and smoky quartz? (Roger Warin)
01 Jun-20:02:10 Re: is it possible for this specimen of hyalite to be associated with other minerals? (Alfredo)
01 Jun-10:24:08 Re: is it possible for this specimen of hyalite to be associated with other minerals? (Rick Roan)
01 Jun-10:21:30 Is malachite rare? (Matt_zukowski)
01 Jun-09:51:59 Re: is it possible for this specimen of hyalite to be associated with other minerals? (Matt_zukowski)
01 Jun-09:21:32 Re: is it possible for this specimen of hyalite to be associated with other minerals? (Rick Roan)
01 Jun-07:40:50 Re: mineral identification tips (Cascaillou)
31 May-16:04:59 Is this a rhyolite matrix with calcite and smoky quartz? (Gk68)
31 May-15:40:58 Re: don lum collection (Don Lum)
31 May-15:40:12 Re: is this dolomite-pyrite-siderite? (Gk68)
31 May-09:28:53 Re: is it possible for this specimen of hyalite to be associated with other minerals? (Rick Roan)
31 May-08:49:08 Re: is it possible for this specimen of hyalite to be associated with other minerals? (Alfredo)
31 May-07:33:18 Re: is it possible for this specimen of hyalite to be associated with other minerals? (Rick Roan)

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A general guide for using the Forum with some rules and tips
The information provided within this Forum about localities is only given to allow reference to them. Any visit to any of the localities requires you to obtain full permission and relevant information prior to your visit. FMF is strictly against any illicit activities related to collecting minerals.
Help with identification
  
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metwerks




Joined: 17 Feb 2014
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Location: Milwaukee, WI

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PostPosted: May 31, 2016 07:17    Post subject: Help with identification  
Found the in SE wisconsin and curious to understand the unusual texture. It has an SG of 2.95. You can see areas that chipped away the are dark. I assume this is chemical weathering.

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metwerks




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PostPosted: May 31, 2016 07:19    Post subject: Re: Help with identification  
Added view. Possibly Hornblende??

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Peter Megaw
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PostPosted: May 31, 2016 07:58    Post subject: Re: Help with identification  
Looks like a mafic igneous rock...gabbro or basalt. Hornblende possible but a dark pyroxene more likely. Greenish color suggests possible weathering
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