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Michael Shaw
Site Admin
Joined: 30 Apr 2008
Posts: 2248
Location: Oklahoma
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 Posted: Jun 06, 2025 08:46 Post subject: Re: Collection of Michael Shaw - Old Calcite |
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| Mineral: | Calcite |
| Locality: | | Put-In-Bay, South Bass Island, Ottawa County, Ohio, USA |  |
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| Dimensions: | 5.0 x 3.5 cm |
| Description: |
| Parallel growth of gemmy, honey-colored crystals with low-angle rhomb terminations. Collected by Edward Gehrkins in 1868. |
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991 Time(s) |
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Michael Shaw
Site Admin
Joined: 30 Apr 2008
Posts: 2248
Location: Oklahoma
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| Posted: Jun 08, 2025 08:59 Post subject: Re: Collection of Michael Shaw - Czech barite |
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| Mineral: | Barite |
| Locality: | | Příbram, Central Bohemia Region, Bohemia, Czech Republic | |
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| Dimensions: | 6.8 x 4.5 x 2.0 cm |
| Description: |
| Lustrous, doubly terminated, off-white bladed barite crystals on matrix. |
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835 Time(s) |
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Michael Shaw
Site Admin
Joined: 30 Apr 2008
Posts: 2248
Location: Oklahoma
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| Posted: Jun 11, 2025 12:57 Post subject: Re: Collection of Michael Shaw |
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| Mineral: | Calcite |
| Locality: | | Malad Quarry, Malad, Mumbai (Bombay), Mumbai District, Maharashtra, India | |
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| Dimensions: | 7.3 x 6.0 x 3.6 cm |
| Description: |
| A thin shard of quartz matrix hosting yellow calcite crystals to 2.5 cm and pale green prehnite pseudomorphs after laumontite. |
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| Viewed: |
691 Time(s) |
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| Mineral: | Calcite |
| Locality: | | Malad Quarry, Malad, Mumbai (Bombay), Mumbai District, Maharashtra, India | |
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| Dimensions: | 7.3 x 6.0 x 3.6 cm |
| Description: |
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692 Time(s) |
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Michael Shaw
Site Admin
Joined: 30 Apr 2008
Posts: 2248
Location: Oklahoma
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| Posted: Jun 16, 2025 13:22 Post subject: Re: Collection of Michael Shaw |
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| Mineral: | Calcite |
| Locality: | | Minerva I Mine, Ozark-Mahoning group, Cave-in-Rock Sub-District, Hardin County, Illinois, USA | |
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| Dimensions: | 8.8 x 7.1 x 5.0 cm |
| Description: |
| Pale yellow scalenohedral calcite crystals to 6.0 cm on a matrix of brown fluorite. |
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539 Time(s) |
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Michael Shaw
Site Admin
Joined: 30 Apr 2008
Posts: 2248
Location: Oklahoma
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| Posted: Jun 18, 2025 11:08 Post subject: Re: Collection of Michael Shaw - Hydroboracite |
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The Kohnstein Quarry is known for the occurrence of several rare borate minerals, one being Hydroboracite. This location is an anhydrite/gypsum quarry in the Harz mountains, inactive since 2008.
| Mineral: | Hydroboracite |
| Locality: | | Kohnstein Quarry, Niedersachswerfen, Nordhausen District, Thuringia/Thüringen, Germany | |
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| Dimensions: | 9.2 x 5.3 x 3.1 cm. |
| Description: |
| Radiating sprays of opaque white acicular hydroboracite crystals on gray anhydrite. |
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427 Time(s) |
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Michael Shaw
Site Admin
Joined: 30 Apr 2008
Posts: 2248
Location: Oklahoma
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| Posted: Jun 22, 2025 03:33 Post subject: Re: Collection of Michael Shaw - Michigan silver |
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| Mineral: | Silver |
| Locality: | | Mohawk Mine, Mohawk, Keweenaw County, Michigan, USA | |
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| Dimensions: | 5.5 x 4.0 x 1.8 cm |
| Description: |
| An aggregate of arborescent native silver crystals. |
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| Viewed: |
240 Time(s) |
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Michael Shaw
Site Admin
Joined: 30 Apr 2008
Posts: 2248
Location: Oklahoma
|
| Posted: Jun 24, 2025 19:31 Post subject: Re: Collection of Michael Shaw |
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| Mineral: | Prehnite |
| Locality: | | Paterson, Passaic County, New Jersey, USA | |
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| Dimensions: | 12.8 x 10.7 cm |
| Description: |
| Botryoidal, translucent mint-green prehnite covering a basalt matrix. |
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| Viewed: |
37 Time(s) |
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