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Michael Shaw
Site Admin
Joined: 30 Apr 2008
Posts: 2252
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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| Viewed: |
1549 Time(s) |
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Michael Shaw
Site Admin
Joined: 30 Apr 2008
Posts: 2252
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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| Viewed: |
1400 Time(s) |
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Michael Shaw
Site Admin
Joined: 30 Apr 2008
Posts: 2252
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: |
1263 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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| Viewed: |
1267 Time(s) |
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Michael Shaw
Site Admin
Joined: 30 Apr 2008
Posts: 2252
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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| Viewed: |
1119 Time(s) |
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Michael Shaw
Site Admin
Joined: 30 Apr 2008
Posts: 2252
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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| Viewed: |
1007 Time(s) |
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Michael Shaw
Site Admin
Joined: 30 Apr 2008
Posts: 2252
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: |
809 Time(s) |
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Michael Shaw
Site Admin
Joined: 30 Apr 2008
Posts: 2252
Location: Oklahoma
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| 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: |
619 Time(s) |
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Michael Shaw
Site Admin
Joined: 30 Apr 2008
Posts: 2252
Location: Oklahoma
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| Posted: Jun 30, 2025 08:17 Post subject: Re: Collection of Michael Shaw |
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| Mineral: | Calcite |
| Locality: | | Southwest Mine, Bisbee, Warren District, Mule Mountains, Cochise County, Arizona, USA | |
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| Dimensions: | 4.7 x 3.6 x 3.0 cm |
| Description: |
| Lustrous chocolate brown calcite crystals to 1.8 cm, the brown color due to uniform inclusions of iron oxide. Collected on the 6th level by Dick Graeme in 1985. |
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393 Time(s) |
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Michael Shaw
Site Admin
Joined: 30 Apr 2008
Posts: 2252
Location: Oklahoma
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| Posted: Jul 02, 2025 14:07 Post subject: Re: Collection of Michael Shaw |
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| Mineral: | Fluorite |
| Locality: | | Larak Island, Qeshm County, Hormozgan Province, Iran | |
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| Dimensions: | 4.0 x 3.1x 2.4 cm |
| Description: |
| Translucent to transparent pale green fluorite crystals to 2.6 cm. The crystals are a mix of cube and octahedron. Collected from a salt diapir outcrop in 2024. |
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| Viewed: |
225 Time(s) |
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Michael Shaw
Site Admin
Joined: 30 Apr 2008
Posts: 2252
Location: Oklahoma
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| Posted: Jul 03, 2025 10:12 Post subject: Re: Collection of Michael Shaw |
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I have been looking through photos and picking out those that are less than optimal. I re-shot this specimen yesterday. It's one of my favorite Tri-State specimens.
| Mineral: | Galena |
| Locality: | | Ballard Mine, Baxter Springs, Picher Field, Tri-State District, Cherokee County, Kansas, USA | |
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| Dimensions: | 7.0 x 6.0 cm |
| Description: |
Metallic, lead-gray, cubic galena crystal measuring with octahedral surface
fortifications and several brassy marcasite crystals scattered about. |
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| Viewed: |
131 Time(s) |
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Carles Millan
Site Admin
Joined: 05 May 2007
Posts: 1537
Location: Catalonia
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| Posted: Jul 03, 2025 11:14 Post subject: Re: Collection of Michael Shaw |
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| Very nice cluster of {100}{111} crystals of galena, Michael. The Tri-State District has been a classic locality of that species for a long time. Congrats!
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Michael Shaw
Site Admin
Joined: 30 Apr 2008
Posts: 2252
Location: Oklahoma
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| Posted: Jul 03, 2025 15:16 Post subject: Re: Collection of Michael Shaw |
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| Carles Millan wrote: | | Very nice cluster of {100}{111} crystals of galena, Michael. The Tri-State District has been a classic locality of that species for a long time. Congrats! |
Thanks you Carles. A classic locality for sure. The Ballard Mine was part of the Picher Field, considered the richest field in the Tri-State District. The mine was active from 1951 to 1969 and was a prolific specimen producer. Note the huge waste piles in the photo. Baxter Springs has a nice little museum that tells the history of the mines with many photos and artifacts from the district. This specimen was mined in the mid 1950s and was handled by New York mineral dealer Martin Erhmann.
| Mineral: | _Ballard Mine, Baxter Springs, Kansas |
| Description: |
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60 Time(s) |
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