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29 Mar-00:03:53 Identification question (Jim Wilkinson)
28 Mar-23:16:36 Re: collection of volkmar stingl (Volkmar Stingl)
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28 Mar-09:37:50 Re: 2 unknowns co-occurring with caledonite, grand reef mine, az (Cfrench58)
27 Mar-19:47:08 Re: 2 unknowns co-occurring with caledonite, grand reef mine, az (Pete Richards)
27 Mar-16:15:44 Re: 2 unknowns co-occurring with caledonite, grand reef mine, az (Cfrench58)
27 Mar-15:18:59 Re: 2 unknowns co-occurring with caledonite, grand reef mine, az (Alfredo)
27 Mar-14:39:29 2 unknowns co-occurring with caledonite, grand reef mine, az (Cfrench58)
27 Mar-05:21:48 Re: the mim museum in beirut, lebanon (Mim Museum)
27 Mar-05:03:26 Re: trying to find information on rose/pink quartz and tourmaline associations. (Ning)
27 Mar-02:39:50 Re: the mim museum in beirut, lebanon (Tobi)
27 Mar-00:23:28 Re: collection of volkmar stingl (Volkmar Stingl)
26 Mar-00:53:41 Re: collection of volkmar stingl (Volkmar Stingl)
25 Mar-13:32:10 Re: collection of michael shaw (Michael Shaw)
25 Mar-00:25:58 The mizunaka collection - quartz (Am Mizunaka)
23 Mar-13:35:22 Re: collection of firmo espinar (Firmo Espinar)
22 Mar-08:32:28 Re: collection of michael shaw (Michael Shaw)
22 Mar-04:20:41 Re: the mim museum in beirut, lebanon (Mim Museum)
21 Mar-22:49:19 Re: green seam. Looks like it in a state of decay. (Ning)
21 Mar-22:47:40 Re: green seam. Looks like it in a state of decay. (Ning)
21 Mar-22:45:25 Re: green seam. Looks like it in a state of decay. (Ning)
21 Mar-15:34:23 Re: the mizunaka collection - quartz (Am Mizunaka)
21 Mar-14:35:08 Re: jim’s mineral collection (Jim Wilkinson)
21 Mar-14:15:36 The 4th phoenix heritage mineral show (phms) hosted by mineralogical society of arizona (m (Chris Whitney-smith)
21 Mar-04:36:10 Re: the mizunaka collection (Tobi)

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Opaque black Quartz, Locality info/matrix info?
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James Catmur
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PostPosted: Jul 16, 2020 07:20    Post subject: Re: Opaque black Quartz, Locality info/matrix info?  

Riccardo Modanesi wrote:
Hi to everybody! James, yes, transparent obsidian DOES exist, it's called "apache tears", small spheres in perlite, from Arizona, USA and Mexico (I don't remember the proper locality anymore, I apologize).
Greetings from Italy by Riccardo.


James Catmur wrote:
briggzi31 wrote:
about as opaque as black obsidian


I have Obsidian that is totally transparent (although my best piece was stolen)


Riccardo, I have transparent obsidian tools from when I lived in Mexico (as a child). Mainly from Tepoztlán, Morelos, Mexico but who knows where the Aztecs got the obsidian from
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PostPosted: Jul 16, 2020 13:49    Post subject: Re: Opaque black Quartz, Locality info/matrix info?  

Thank you all for your hard work!! It means so much to me.

@Volkmar, the second quartz makes more sense that spessartine, I just assumed because the color matches spessartines, and it was transparent and smokey/spessartines is a common combination found in China. But I see now that the elongated shape would suggest quartz.

To clarify what I mean when I said as opaque as black obsidian, I meant as opaque as the massive black obsidian that is very commonly available. I have picked some up myself on the coast of California, as well as near Portland, Oregon. When held up to a light, only the edges where the quartz crystal is very thin are transparent, and only slightly so, just like massive black obsidian is. I have included a picture from my collection for reference. Hope that clears up any confusion!

Best,
Sam



Obisidian.JPG
 Mineral: Obsidian
 Locality:
[unknown locality]
 Dimensions: 25cm * 10cm * 6cm
 Description:
The Morion quartz is as opaque as this.
 Viewed:  2064 Time(s)

Obisidian.JPG


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