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Michael Shaw
Site Admin
Joined: 30 Apr 2008
Posts: 2197
Location: Oklahoma
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 Posted: Feb 25, 2025 09:36 Post subject: Re: Collection of Michael Shaw |
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| Tobi wrote: | That malachite is a great specimen, Michael!
Malachite from Grube Friedrich is an absolute classic from Siegerland, and many collectors consider them the best malachites from Germany.
And though I don't collect malachite, I think you are lucky that you have found such a good specimen of this classic material.
Congratulations :-)
Best regards
Tobi |
Tobi,
Thank you for the added insight on Grube Friedrich. I have to admit that I wasn't at all familiar with the locality. I tried to find more information about the location online, but there wasn't much other than what Mindat said - a Fe-Cu-Ni-mine opened 1803 and closed in 1953.
In the end I thought that this piece was pretty attractive and would make a good addition to our suite of minerals from Germany, so I'm happy to have found it.
All the best,
Michael
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Michael Shaw
Site Admin
Joined: 30 Apr 2008
Posts: 2197
Location: Oklahoma
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| Posted: Feb 27, 2025 09:27 Post subject: Re: Collection of Michael Shaw |
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| Mineral: | Prehnite |
| Locality: | | Prospect Park Quarry, Prospect Park, Passaic County, New Jersey, USA |  |
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| Dimensions: | 7.0 x 6.6 x 4.4 cm |
| Description: |
| Spherical green prehnite aggregates associated with small pseudo-cubic colorless apophyllite crystals. |
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| Viewed: |
1123 Time(s) |
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| Mineral: | Heulandite-Ca |
| Locality: | | Jalgaon District, Maharashtra, India | |
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| Dimensions: | 8.8 x 6.6 x 3.1 cm |
| Description: |
| Pale salmon-colored heulandite crystals to 2.3 cm on a frothy quartz and basalt matrix. Collected in 2023. |
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1119 Time(s) |
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Michael Shaw
Site Admin
Joined: 30 Apr 2008
Posts: 2197
Location: Oklahoma
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| Posted: Mar 03, 2025 09:38 Post subject: Re: Collection of Michael Shaw - radioactives |
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I collected the following two specimens 63 years ago. They have been in a flat with several other old specimens - finally photographed and catalogued them!
| Mineral: | Autunite |
| Locality: | | Ruggles Mine, Grafton, Grafton County, New Hampshire, USA | |
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| Dimensions: | 5.2 x 5.1 x 3.1 cm |
| Description: |
| Pale yellow masses of autunite associated with black uraninite and brown zircon var. cyrtolite with small patches of darker yellow uranophane. The autunite fluoresces a vivid green helping to distinguish it from the uranophane, which does not fluoresce. |
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| Viewed: |
863 Time(s) |
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| Mineral: | Autunite |
| Locality: | | Ruggles Mine, Grafton, Grafton County, New Hampshire, USA | |
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| Dimensions: | 5.2 x 5.1 x 3.1 cm |
| Description: |
| Previous specimen under MW UV. |
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| Viewed: |
866 Time(s) |
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| Mineral: | Autunite |
| Locality: | | Ruggles Mine, Grafton, Grafton County, New Hampshire, USA | |
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| Dimensions: | 4.4 x 4.2 x 2.3 cm |
| Description: |
| Bright lemon-yellow scales of autunite on a feldspar matrix. |
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| Viewed: |
864 Time(s) |
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Michael Shaw
Site Admin
Joined: 30 Apr 2008
Posts: 2197
Location: Oklahoma
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| Posted: Mar 05, 2025 09:22 Post subject: Re: Collection of Michael Shaw |
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| Mineral: | Langite |
| Locality: | | Allihies, County Cork, Ireland |  |
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| Dimensions: | 5.4 x 3.6 x 1.2 cm |
| Description: |
| A thin crust of blue-green langite microcrystals covering the top surface of a brown limonitic matrix. |
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767 Time(s) |
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Michael Shaw
Site Admin
Joined: 30 Apr 2008
Posts: 2197
Location: Oklahoma
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| Posted: Mar 06, 2025 09:36 Post subject: Re: Collection of Michael Shaw - more Tsumeb |
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| Mineral: | Hydrocerussite on Cerussite |
| Locality: | | Tsumeb Mine, Tsumeb, Otjikoto Region, Namibia | |
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| Dimensions: | 6.0 x 5.3 x 4.7 cm |
| Description: |
| A different view of the Hydrocerussite that I posted earlier. Dull white hydrocerussite coating reticulated twinned cerussite crystals on a frothy gray cerussite matrix. This specimen likely came from the lead pocket in the 3rd oxidation zone. |
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| Viewed: |
694 Time(s) |
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| Mineral: | Aragonite (variety nicholsonite) |
| Locality: | | Tsumeb Mine, Tsumeb, Otjikoto Region, Namibia | |
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| Dimensions: | 6.1 x 5.3 x 4.0 cm. |
| Description: |
| Opaque white pseudohexagonal crystals of zinc-bearing aragonite known as nicholsonite on a gray matrix with micro crystals of green duftite. |
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| Viewed: |
686 Time(s) |
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| Mineral: | Aragonite (variety nicholsonite) |
| Locality: | | Tsumeb Mine, Tsumeb, Otjikoto Region, Namibia | |
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| Dimensions: | 6.1 x 5.3 x 4.0 cm |
| Description: |
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| Viewed: |
691 Time(s) |
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Michael Shaw
Site Admin
Joined: 30 Apr 2008
Posts: 2197
Location: Oklahoma
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| Posted: Mar 12, 2025 08:19 Post subject: Re: Collection of Michael Shaw - pyromorphite |
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| Mineral: | Pyromorphite |
| Locality: | | Vojtech Mine, Brezové Hory deposit, Brezové Hory area (Birkenberg), Příbram, Central Bohemia Region, Bohemia, Czech Republic | |
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| Dimensions: | 4.8 x 4.0 x 3.3 cm |
| Description: |
| Bright green acicular to prismatic crystals of pyromorphite lining a cavity in an iron-rich matrix. |
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| Viewed: |
515 Time(s) |
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Tobi
Site Admin
Joined: 07 Apr 2009
Posts: 4217
Location: Germany
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| Posted: Mar 13, 2025 09:52 Post subject: Re: Collection of Michael Shaw |
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Hi Michael,
a very nice pyromorphite from Pribram / CZ. We see quite many good pyros from different localities on the market, classics and newer finds. At every show and in every shop you'll see pyro specimens from China, Germany and France. But these pieces from Pribram are really rare and many collectors might not even know that they are wonderful classics that were known to the mineral world even before many of the other famous pyromorphite localities in the world were discovered.
I'm a collector who really likes pyromorphite but I don't remember that I saw many pieces like yours. Some museums have them but I guess not many collectors have the luck of getting such a beautiful classic from this very very old mining area.
A fabulous piece, Michael, I love it!
Tobi
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Michael Shaw
Site Admin
Joined: 30 Apr 2008
Posts: 2197
Location: Oklahoma
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| Posted: Mar 13, 2025 18:41 Post subject: Re: Collection of Michael Shaw |
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Thanks Tobi,
Next to galena, pyromorphite is probably my second favorite mineral. I was really happy to find this one last month in Tucson.
Michael
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Tobi
Site Admin
Joined: 07 Apr 2009
Posts: 4217
Location: Germany
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| Posted: Mar 14, 2025 02:39 Post subject: Re: Collection of Michael Shaw |
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| Michael Shaw wrote: | | Thanks Tobi [...] I was really happy to find this one last month in Tucson. |
Congratulations again on this beautiful treasure!
| Michael Shaw wrote: | | Next to galena, pyromorphite is probably my second favorite mineral.l |
So your second favorite mineral is your favorite secondary mineral ;-)
Besides that poor joke: We have much in common concerning our taste in minerals. My most favourite ones are without a doubt quartz and fluorite, but galena and pyromorphite (+ tourmaline + rhodochrosite) are right behind ;-)
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