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Chalcedony | |
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Black Hills Rockhound Area, Black Hills, Graham Co., Arizona, USA Subject: 26 mm long. P. Cristofono specimen and photo. Field-collected 2006. |
| © 2006 Peter Cristofono | Photo ID: 50422 View Count: 220 |
Chalcedony | |
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Black Hills Rockhound Area, Black Hills, Graham Co., Arizona, USA Subject: 16 mm long. P. Cristofono specimen and photo. Field-collected 2006. |
| © 2006 Peter Cristofono | Photo ID: 50296 View Count: 170 |
Chalcedony | |
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Black Hills Rockhound Area, Black Hills, Graham Co., Arizona, USA Left: white chalcedony, 23 mm long. Right: Same specimen fluorescing bright green in SW ultraviolet light. P. Cristofono specimen and photo. Field-collected 2006. |
| © 2006 Peter Cristofono | Photo ID: 50524 View Count: 164 |
Chalcedony | |
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Black Hills Rockhound Area, Black Hills, Graham Co., Arizona, USA Subject length: 26 mm. P. Cristofono specimen and photo. Field-collected 2006. |
| © 2006 Peter Cristofono | Photo ID: 50426 View Count: 157 |
Chalcedony (Var: Agate) : SiO2 | |
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Black Hills Rockhound Area, Black Hills, Graham Co., Arizona, USA Subject: 27 mm long. P. Cristofono specimen and photo. Field-collected 2006. |
| © 2006 Peter Cristofono | Photo ID: 50421 View Count: 349 |
Chalcedony (Var: Agate) : SiO2 | |
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Black Hills Rockhound Area, Black Hills, Graham Co., Arizona, USA Self collected as float in March, 2007. Specimen is 1.5 cm. |
| Photo ID: 140789 View Count: 268 | |
Agate (Var: Fire Agate) : SiO2 | |
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Black Hills Rockhound Area, Black Hills, Graham Co., Arizona, USA Subject: 10 mm x 13 mm. P. Cristofono specimen and photo. Field collected 2006. |
| © 2006 Peter Cristofono | Photo ID: 50424 View Count: 401 |
Agate (Var: Fire Agate) : SiO2 | |
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Black Hills Rockhound Area, Black Hills, Graham Co., Arizona, USA Fire agate -- length: 11 mm. Internal greenish "fire" visible on top. P. Cristofono specimen and photo. Field-collected 2006. |
| © 2006 Peter Cristofono | Photo ID: 50291 View Count: 392 |
Quartz : SiO2 | |
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Black Hills Rockhound Area, Black Hills, Graham Co., Arizona, USA 2.6cm x 2.5cm x 1.0cm Flower like crystal cluster from the fire agate beds. Collectin of Danny Jones |
| © Danny Jones | Photo ID: 186081 View Count: 64 |
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