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12 Apr-23:33:07 Re: collection of volkmar stingl (Volkmar Stingl)
12 Apr-16:13:00 Re: don lum collection (Don Lum)
12 Apr-15:37:19 The mizunaka collection - beryl (Am Mizunaka)
12 Apr-14:55:06 Re: collection of carles millan (Carles Millan)
12 Apr-14:46:24 Re: collection of carles millan (Dany Mabillard)
12 Apr-14:44:22 Re: don lum collection (Dany Mabillard)
11 Apr-22:02:20 Re: don lum collection (Don Lum)
10 Apr-14:59:55 Re: the mizunaka collection - elbaite (Am Mizunaka)
10 Apr-09:05:31 Re: collection of carles millan (Carles Millan)
10 Apr-08:08:58 Re: collection of michael shaw (Michael Shaw)
10 Apr-07:54:53 Re: the mim museum in beirut, lebanon (Carles Millan)
10 Apr-07:44:49 Re: the mim museum in beirut, lebanon (Mim Museum)
10 Apr-05:49:50 Re: the mim museum in beirut, lebanon (Tobi)
10 Apr-05:46:01 Re: collection of firmo espinar (Tobi)
10 Apr-05:38:13 Re: collection of carles millan (Tobi)
10 Apr-05:34:12 Re: the mizunaka collection (Tobi)
10 Apr-05:19:03 Re: collection of michael shaw (Tobi)
10 Apr-03:51:13 Re: collection of carles millan (Carles Millan)
09 Apr-21:52:08 The mizunaka collection - elbaite (Am Mizunaka)
09 Apr-08:12:54 Re: collection of carles millan (Michael Shaw)
09 Apr-05:01:03 Collection of carles millan - fluorapatite from kami mine (Carles Millan)
07 Apr-08:51:49 Re: collection of michael shaw - pyromorphite (Michael Shaw)
06 Apr-12:34:41 Re: kimberlite and diamond? (Lluis)
06 Apr-11:19:04 Re: kimberlite and diamond? (Jesse Fisher)
06 Apr-10:19:46 Re: kimberlite and diamond? (Bob Carnein)

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Identification question
  
  Index -> What is it? - Where is it from?
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Jim Wilkinson




Joined: 16 Jan 2021
Posts: 30
Location: Maryland


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PostPosted: Mar 29, 2024 00:03    Post subject: Identification question  

The dark brown material in the upper part of the photo. In large boulder---area likely does not allow rock collecting


staurolite 1 (2) cr.jpg
 Mineral: staurolite?
 Locality:
Baltimore, Maryland, USA
 Dimensions: 2.0 X 1.0 cm
 Description:
Am not sure if this is staurolite. Staurolite has been reported in this area - host rock is Loch Raven schist
 Viewed:  428 Time(s)

staurolite 1 (2) cr.jpg


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James Catmur
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Joined: 14 Sep 2006
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PostPosted: Mar 29, 2024 06:20    Post subject: Re: Identification question  

Jim

Is there any way you could do a few basic tests? Streak and hardness

James
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Bob Carnein




Joined: 22 Aug 2013
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Location: Florissant, CO


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PostPosted: Mar 29, 2024 09:31    Post subject: Re: Identification question  

The photo is a bit unclear, but it looks to me like iron-oxide staining on quartz. Staurolite usually occurs as well formed crystals (porphyroblasts) rather than irregular masses.
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Bob Morgan




Joined: 18 Jan 2018
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PostPosted: Mar 29, 2024 20:12    Post subject: Re: Identification question  

There is a great mineral society in Baltimore with several members who have collected extensively locally. I'm sure they will be of help.
It's the Baltimore, Maryland Chesapeake Bay Mineral Society
Meetings: 2nd Friday of the month, except July – August
19:30:00
Westchester Community Center, 2414 Westchester Ave, Ellicott City, MD 21043
Check out their web site for more contact information.
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Jim Wilkinson




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PostPosted: Mar 29, 2024 23:25    Post subject: Re: Identification question  

Thanks!
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