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Calcite : CaCO3 | |
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Benchmark Quarry, St Johnsville, Montgomery Co., New York, USA Large yellow-brown translucent calcite crystal with long, thin marcasite inclusions visible inside the calcite. One of the few calcite crystals I obtained from this locality with no damage. Overall size of mineral specimen: 9x6x4 cm. Size of individual crystals: 7 cm. |
| © 2001 John H. Betts | Photo ID: 983 View Count: 440 |
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Fonda, Mohawk Township, Montgomery Co., New York, USA Calcite with a "Herkimer Diamond" quartz crystal. The specimen is about 7.2 cm in length. Specimen and photo: Steve Stuart. The calcite fluoresces a magenta pink under MW UV light. Some of the calcite fluoresces more reddish in spots. |
| © SMS 2006 | Photo ID: 62219 View Count: 190 |
Marcasite : FeS2, Calcite : CaCO3, Dolomite : CaMg(CO3)2 | |
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Benchmark Quarry, St Johnsville, Montgomery Co., New York, USA This miniature specimen measures 7.4x3.8x3.2cm. The photo is 1.5x1.5cm. Perfect calcite nodules up to 5mm with beautiful exposed marcasite needle clusters up to 4mm surrounded by dolomite all completely covering the dolomitic limestone host. One hardly noticeable, 1.5cm contact area. Collection of Michael J. Lundquist |
| Photo ID: 67466 View Count: 294 | |
Marcasite : FeS2, Calcite : CaCO3 | |
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Diamond Acres (Hastings Farm), Fonda, Mohawk Township, Montgomery Co., New York, USA Elongated marcasite crystals in calcite. Field of view is 12 mm across. Linda Frahm specimen. P. Cristofono photo. |
| © 2008 Peter Cristofono | Photo ID: 147036 View Count: 139 |
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Benchmark Quarry, St Johnsville, Montgomery Co., New York, USA Marcasite xls in Calcite Specimen: CFB-121 Size: 4.5 x 4 x 2.5 cm Curtis F. Breuer Collection and Photograph |
| © Curtis Breuer | Photo ID: 196261 View Count: 44 |
Quartz : SiO2 | |
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St Johnsville, Montgomery Co., New York, USA Field of view: 2.5 cm wide. |
| © 2004 Peter Cristofono | Photo ID: 14614 View Count: 348 |
Quartz : SiO2 | |
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Hickory Hill, Fonda, Mohawk Township, Montgomery Co., New York, USA A flat cousin to the herkimers, this Quartz crystal is gemmy through and through, with very sharp edges and interesting form. There is only a little conchoidal fracture along the bottom edge, which is undoubtedly the attachment point. Interesting and attractive crystal, better in person. 2.5 x 2 x .9 cm |
| © Rob Lavinsky | Photo ID: 49066 View Count: 220 |
Quartz : SiO2, Calcite : CaCO3, Dolomite : CaMg(CO3)2 | |
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Benchmark Quarry, St Johnsville, Montgomery Co., New York, USA A large "Herkimer-style" quartz crystal, sharp, lustrous and gemmy, measuring 5 cm, with a smaller crystal nearby, on a matrix that also has sulfides anddolomite, and a cluster of euhedral calcite crystals. Came with a label that shows it to have been purchased at the Rochester Mineralogical Symposium Auction in April of 2000. such a large and ... |
| © Rob Lavinsky | Photo ID: 49499 View Count: 202 |
Quartz : SiO2, Dolomite : CaMg(CO3)2 | |
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Benchmark Quarry, St Johnsville, Montgomery Co., New York, USA This is a huge, complete, jewel-like Herkimer-style quartz crystal on a natural “base” of dolomite. It was extracted from the pocket without any damage save for a natural contact of about 2 cm on the far right side of the rear edge (shown, far right of rightmost photo), and can be displayed beautifully from any side. An extremely striking ... |
| © Rob Lavinsky | Photo ID: 62409 View Count: 185 |
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St Johnsville, Montgomery Co., New York, USA Ex: Lawrence Conklin Collection, Dr. E David Collection. 56 x 60 x 42 mm. Marcasite rods are easily visible within the calcite crystal.. www.freilichminerals.com |
| © JAF, LLC | Photo ID: 130219 View Count: 139 |
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