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Michael Shaw
Site Admin
Joined: 30 Apr 2008
Posts: 2228
Location: Oklahoma
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 Posted: Apr 29, 2025 08:23 Post subject: Re: Collection of Michael Shaw |
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Dioptase from Gautala. Dioptase is notoriously difficult to photograph and achieve true color rendition due to inherent sensitivity of the camera sensor. Both of these pieces were photographed under identical illumination with minimal post capture editing. The natural color of the two specimens is actually quite different.
| Mineral: | Dioptase |
| Locality: | | Gautala, Mindouli District, Pool Department, Republic of Congo |  |
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| Dimensions: | 7.5 x 4.5 x 1.4 cm |
| Description: |
| A thin plate of lustrous emerald-green dioptase crystals. |
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| Viewed: |
498 Time(s) |
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| Mineral: | Dioptase |
| Locality: | | Gautala, Mindouli District, Pool Department, Republic of Congo | |
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| Dimensions: | 8.0 x 6.0 x 2.5 cm |
| Description: |
| Lustrous emerald-green dioptase crystals forming a concave plate. |
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| Viewed: |
496 Time(s) |
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Michael Shaw
Site Admin
Joined: 30 Apr 2008
Posts: 2228
Location: Oklahoma
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| Posted: May 01, 2025 09:04 Post subject: Re: Collection of Michael Shaw |
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| Mineral: | Azurite |
| Locality: | | M'Fouati, M'Fouati District, Bouenza Department, Republic of the Congo |  |
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| Dimensions: | 4.4 x 2.3 x 1.3 cm |
| Description: |
| Lustrous bladed deep blue azurite crystals to 0.6 cm covering the top of a pale brown matrix from the Yanga Koubenza deposit. |
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| Viewed: |
390 Time(s) |
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Michael Shaw
Site Admin
Joined: 30 Apr 2008
Posts: 2228
Location: Oklahoma
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| Posted: May 05, 2025 08:26 Post subject: Re: Collection of Michael Shaw |
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| Mineral: | Cassiterite |
| Locality: | | Minas da Panasqueira, Aldeia de São Francisco de Assis, Covilhã, Castelo Branco, Cova da Beira, Centro, Portugal | |
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| Dimensions: | 5.8 x 4.1 x 2.8 cm |
| Description: |
| Lustrous partially gemmy dark brown cassiterite crystals on a matrix of silvery muscovite, with several quartz crystals on the reverse side. |
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| Viewed: |
211 Time(s) |
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Michael Shaw
Site Admin
Joined: 30 Apr 2008
Posts: 2228
Location: Oklahoma
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| Posted: May 07, 2025 10:22 Post subject: Re: Collection of Michael Shaw - Quartz ps. after Barite |
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| Mineral: | Quartz |
| Locality: | | Warm Springs, Hot Creek Range, Tybo District, Nye County, Nevada, USA | |
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| Dimensions: | 7.0 x 5.0 x 4.6 cm |
| Description: |
| Sugary-textured quartz forming a hollow epimorph of barite crystals. |
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| Viewed: |
87 Time(s) |
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| Mineral: | Quartz |
| Locality: | | Warm Springs, Hot Creek Range, Tybo District, Nye County, Nevada, USA | |
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| Dimensions: | 7.0 x 5.0 x 4.6 cm |
| Description: |
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| Viewed: |
87 Time(s) |
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James Catmur
Site Admin
Joined: 14 Sep 2006
Posts: 1463
Location: Cambridge
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| Posted: May 07, 2025 14:13 Post subject: Re: Collection of Michael Shaw |
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| I love epimorphs
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