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Brucite : Mg(OH)2 | |
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Hunting Hill quarry (Rockville Crushed Stone Quarry; Travilah Quarry; Rockville Quarry; Bardon Stone Quarry), Rockville, Montgomery Co., Maryland, USA Brucite in bladed crystals, obtained June 1988. Alan Goldstein specimen (#5059) and photo. FOV ~1.5 cm |
| © Alan Goldstein | Photo ID: 49010 View Count: 354 |
Calcite : CaCO3 | |
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Hunting Hill quarry (Rockville Crushed Stone Quarry; Travilah Quarry; Rockville Quarry; Bardon Stone Quarry), Rockville, Montgomery Co., Maryland, USA Calcite in tubular shapes. Specimen 511 in the collection of the photographer, Alan Goldstein. |
| © Alan Goldstein | Photo ID: 24939 View Count: 335 |
Calcite : CaCO3, Grossular : Ca3Al2[SiO4]3 | |
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Hunting Hill quarry (Rockville Crushed Stone Quarry; Travilah Quarry; Rockville Quarry; Bardon Stone Quarry), Rockville, Montgomery Co., Maryland, USA Size of the calcite matrix is 4.5 cm x 2 cm, but the size of the garnet is 5mm x 5mm. |
| Photo ID: 216853 View Count: 39 | |
Chalcedony | |
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Hunting Hill quarry (Rockville Crushed Stone Quarry; Travilah Quarry; Rockville Quarry; Bardon Stone Quarry), Rockville, Montgomery Co., Maryland, USA Lovely botryoidal red brown and orange Chalcedony on massive Brucite and other minerals. FOV = 6.5 cm. Collected 2005 by J. Wingard. |
| © J. Wingard | Photo ID: 39192 View Count: 294 |
Chalcedony, Brucite : Mg(OH)2 | |
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Hunting Hill quarry (Rockville Crushed Stone Quarry; Travilah Quarry; Rockville Quarry; Bardon Stone Quarry), Rockville, Montgomery Co., Maryland, USA Clear Chalcedony covers an iron-stained nodule of Brucite and other minerals. FOV = 4 cm. From an old fall on the second level near last years agate find. Collected 2005 by J. Wingard. |
| © J. Wingard | Photo ID: 39191 View Count: 230 |
Chromite : FeCr2O4, Calcite : CaCO3, Serpentine Group : D2[Si2O5](OH)4 + or - nH2O | |
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Hunting Hill quarry (Rockville Crushed Stone Quarry; Travilah Quarry; Rockville Quarry; Bardon Stone Quarry), Rockville, Montgomery Co., Maryland, USA Rounded crystals of Chromite in massive Calcite and green Serpentine. 11 cm across maximum. Collected in 2005 by J. Wingard. |
| © J. Wingard | Photo ID: 39168 View Count: 463 |
Clinochlore : (Mg,Fe2+)5Al[(OH)8|AlSi3O10], Grossular : Ca3Al2[SiO4]3, Diopside : CaMg[Si2O6] | |
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Hunting Hill quarry (Rockville Crushed Stone Quarry; Travilah Quarry; Rockville Quarry; Bardon Stone Quarry), Rockville, Montgomery Co., Maryland, USA Orange translucent grossular garnets in Clinochlore on a matrix of massive chrome diopside. The Clinochlore crystals are nicely formed but are coated in some sort of white opaquish film. There are some white hydromagnesite crystals present as well. Specimen is much more attractive and a more intense green in person. Collected by J. Wingard 10-04 ... |
| © J.N. Wingard | Photo ID: 21462 View Count: 400 |
Clinochlore : (Mg,Fe2+)5Al[(OH)8|AlSi3O10] | |
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Hunting Hill quarry (Rockville Crushed Stone Quarry; Travilah Quarry; Rockville Quarry; Bardon Stone Quarry), Rockville, Montgomery Co., Maryland, USA Clinoclore, obtained in June 1988. Alan Goldstein specimen (#1348) and photo. |
| © Alan Goldstein | Photo ID: 35103 View Count: 320 |
Clinozoisite : {Ca2}{Al3}[O|OH|SiO4|Si2O7], Calcite : CaCO3, Diopside : CaMg[Si2O6] | |
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Hunting Hill quarry (Rockville Crushed Stone Quarry; Travilah Quarry; Rockville Quarry; Bardon Stone Quarry), Rockville, Montgomery Co., Maryland, USA Embedded in a layer of white and gray Calcite are sharply formed, translucent yellow-green Clinozoisite crystals. The lower crystal is double-terminated, however it does have some damage. The two main crystals are ~2.8 cm long. The back portion of the specimen contains a vein of bright orange grossular garnet. Self-collected and in the personal ... |
| © J.N. Wingard | Photo ID: 14552 View Count: 393 |
Clinozoisite : {Ca2}{Al3}[O|OH|SiO4|Si2O7] | |
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Hunting Hill quarry (Rockville Crushed Stone Quarry; Travilah Quarry; Rockville Quarry; Bardon Stone Quarry), Rockville, Montgomery Co., Maryland, USA Clinozoisite crystals in matrix, obtained in June 1988. Alan Goldstein specimen (#1347) and photo. |
| © Alan Goldstein | Photo ID: 35105 View Count: 286 |
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