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Michael Shaw
Site Admin
Joined: 30 Apr 2008
Posts: 2249
Location: Oklahoma
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 Posted: Nov 17, 2022 12:55 Post subject: Re: Collection of Michael Shaw |
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| Mineral: | Calcite |
| Locality: | | Conco Mine, North Aurora, Kane County, Illinois, USA |  |
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| Dimensions: | 8.0 x 7.8 x 4.0 cm |
| Description: |
| Grayish scalenohedral calcite crystals included with tiny marcasite crystals. Most of the crystal have sharp phantoms. |
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| Viewed: |
10311 Time(s) |
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| Mineral: | Calcite |
| Locality: | | Conco Mine, North Aurora, Kane County, Illinois, USA | |
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| Dimensions: | 8.0 x 7.8 x 4.0 cm |
| Description: |
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| Viewed: |
10275 Time(s) |
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Michael Shaw
Site Admin
Joined: 30 Apr 2008
Posts: 2249
Location: Oklahoma
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| Posted: Nov 18, 2022 08:19 Post subject: Re: Collection of Michael Shaw |
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| Mineral: | Baryte |
| Locality: | | Magma Mine, Superior, Pioneer District, Pinal Mountains, Pinal County, Arizona, USA | |
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| Dimensions: | 3.5 x 2.8 x 1.8 cm |
| Description: |
| Transparent to translucent, yellow barite crystals in an intergrown group of blocky crystals to 1.0 cm on edge. |
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| Viewed: |
10232 Time(s) |
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Tobi
Site Admin
Joined: 07 Apr 2009
Posts: 4248
Location: Germany
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| Posted: Nov 21, 2022 03:22 Post subject: Re: Collection of Michael Shaw |
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| An excellent baryte specimen with great aesthetics, Michael!
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Michael Shaw
Site Admin
Joined: 30 Apr 2008
Posts: 2249
Location: Oklahoma
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| Posted: Nov 21, 2022 11:36 Post subject: Re: Collection of Michael Shaw |
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| Tobi wrote: | | An excellent baryte specimen with great aesthetics, Michael! |
Thank you, Tobi. It's a small specimen, but as I understand it, the larger crystals tended to be included with a variety of oxides and sulfides causing them to be various shades of brown to black.
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Michael Shaw
Site Admin
Joined: 30 Apr 2008
Posts: 2249
Location: Oklahoma
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| Posted: Nov 21, 2022 11:49 Post subject: Re: Collection of Michael Shaw |
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| Mineral: | Andradite |
| Locality: | | Stanley Butte area, Stanley Butte, Stanley District, San Carlos Indian Reservation, Graham County, Arizona, USA | |
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| Dimensions: | 2.4 x 2.1 cm |
| Description: |
| An intergrown group of green dodecahedral andradite crystals exhibiting slight iridescence. |
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| Viewed: |
10104 Time(s) |
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Tobi
Site Admin
Joined: 07 Apr 2009
Posts: 4248
Location: Germany
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| Posted: Nov 22, 2022 09:32 Post subject: Re: Collection of Michael Shaw |
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| Michael Shaw wrote: | | Tobi wrote: | | An excellent baryte specimen with great aesthetics, Michael! |
Thank you, Tobi. It's a small specimen, but as I understand it, the larger crystals tended to be included with a variety of oxides and sulfides causing them to be various shades of brown to black. |
Thanks for the additional information. The crystals remind me of those from Châtel-Guyon in France, I once had a specimen from there which was very similiar to your piece from Magma Mine.
Regards
Tobi
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Michael Shaw
Site Admin
Joined: 30 Apr 2008
Posts: 2249
Location: Oklahoma
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| Posted: Nov 22, 2022 14:39 Post subject: Re: Collection of Michael Shaw |
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Tobi,
I wasn't familiar with The French location of Chatel-Guyon, so I looked it up on Mindat and yes, the crystals are remarkably similar in color and morphology. Thanks for pointing out this new (to me) location.
Regards,
Michael
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Michael Shaw
Site Admin
Joined: 30 Apr 2008
Posts: 2249
Location: Oklahoma
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| Posted: Nov 23, 2022 10:39 Post subject: Re: Collection of Michael Shaw |
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| Mineral: | Quartz |
| Locality: | | De Baca County, New Mexico, USA | |
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| Dimensions: | 1.9 x 1.6 cm |
| Description: |
| An opaque light brown Cumberland habit quartz crystal known locally as "Pecos Valley Diamonds." |
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| Viewed: |
9942 Time(s) |
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James Catmur
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Joined: 14 Sep 2006
Posts: 1476
Location: Cambridge
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Michael Shaw
Site Admin
Joined: 30 Apr 2008
Posts: 2249
Location: Oklahoma
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| Posted: Nov 25, 2022 09:44 Post subject: Re: Collection of Michael Shaw |
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| Mineral: | Olivenite |
| Locality: | | Majuba Hill Mine, Antelope District, Pershing County, Nevada, USA | |
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| Dimensions: | 5.5 x 3.2 x 2.0 cm |
| Description: |
| Lustrous acicular olive-green olivenite crystals on an iron-rich matrix. |
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| Viewed: |
9799 Time(s) |
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Michael Shaw
Site Admin
Joined: 30 Apr 2008
Posts: 2249
Location: Oklahoma
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| Posted: Nov 27, 2022 10:00 Post subject: Re: Collection of Michael Shaw |
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| Mineral: | Cinnabar with Mercury |
| Locality: | | Almaden Mine, Almadén, Comarca Valle de Alcudia, Ciudad Real, Castilla-La Mancha, Spain | |
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| Dimensions: | 6.5 x 4.0 x 1.9 cm |
| Description: |
| Bright red massive cinnabar with small blebs of silvery native mercury smeared over the surface. |
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| Viewed: |
9610 Time(s) |
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Michael Shaw
Site Admin
Joined: 30 Apr 2008
Posts: 2249
Location: Oklahoma
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| Posted: Nov 29, 2022 09:44 Post subject: Re: Collection of Michael Shaw |
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| Mineral: | Galena |
| Locality: | | Cadjebut Mine, Fitzroy Crossing, Derby-West Kimberley Shire, Western Australia, Australia | |
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| Dimensions: | 6.5 x 4.0 x 3.2 cm |
| Description: |
| Galena crystals to 1.0 cm with cuboctahedral and stepped cubic growth covering the top of a sulfide matrix with minor colorless calcite crystals. |
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| Viewed: |
9505 Time(s) |
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Michael Shaw
Site Admin
Joined: 30 Apr 2008
Posts: 2249
Location: Oklahoma
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| Posted: Dec 02, 2022 09:44 Post subject: Re: Collection of Michael Shaw |
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| Mineral: | Quartz (variety chalcedony) |
| Locality: | | Mopah Spring, Turtle Mountain Wilderness, San Bernardino County, California, USA | |
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| Dimensions: | 5.2 x 3.9 x 2.1 cm |
| Description: |
| A pale pink chalcedony rose that displays green fluorescence under short wave UV. |
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| Viewed: |
9336 Time(s) |
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Michael Shaw
Site Admin
Joined: 30 Apr 2008
Posts: 2249
Location: Oklahoma
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| Posted: Dec 04, 2022 11:02 Post subject: Re: Collection of Michael Shaw |
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I first became aware of these Newfoundland amethyst specimens at the 2020 Tucson Show. After looking through hundreds of specimens I was unable to find an undamaged piece. I'm told this was because the deposit was mined with mechanical equipment resulting in specimens with quite a lot of damage. I forgot about these until I spied a couple of flats at the 2022 Denver Show. To my surprise, most of the pieces were damage free, so I had a second chance to select a few for the collection.
| Mineral: | Quartz (variety amethyst) |
| Locality: | | La Manche, Placentia Bay, Newfoundland (Island), Newfoundland and Labrador, Canada | |
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| Dimensions: | 8.3 x 6.5 x 5.0 cm |
| Description: |
| Tightly intergrown amethyst crystals showing mostly just the pyramidal terminations. |
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| Viewed: |
9236 Time(s) |
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| Mineral: | Quartz (variety amethyst) |
| Locality: | | La Manche, Placentia Bay, Newfoundland (Island), Newfoundland and Labrador, Canada | |
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| Dimensions: | 6.0 x 4.5 x 4.0 cm |
| Description: |
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| Viewed: |
9217 Time(s) |
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Michael Shaw
Site Admin
Joined: 30 Apr 2008
Posts: 2249
Location: Oklahoma
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| Posted: Dec 06, 2022 12:44 Post subject: Re: Collection of Michael Shaw |
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| Mineral: | Gypsum |
| Locality: | | Lily Mine, Umay District, Pisco Province, Ica Department, Peru | |
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| Dimensions: | 9.2 x 7.6 x 4.6 cm |
| Description: |
| Sharp lustrous water-clear crystals of gypsum var. selenite to 5.1 cm across forming an intergrown group. |
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| Viewed: |
9160 Time(s) |
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