Herkimer Diamond Mineral Specimens
St. Johnsville Quarry, New York
St. Johnsville has a quarry managed by Hanson Aggregates. The Herks from this location are similar to others from the region. The Herkimer diamonds are well formed and often attached to matrix. Pyrite bars are a rare association with the Herks and scepters are also encountered here. The location is not open for collecting. Specimens are difficult to get. Most of these fine pieces come from two private collections built during the late 1990s.
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OKF-585 Calcite on Dolomite Hanson Quarry, St. Johnsville, New York. Ex. James Cranston collection. A fine miniature which sports a large parallel growth group of translucent to transparent crystals of the typical yellow color for the locale. They have moderate to heavy inclusions of marcasite on the backside. All views are good so backside may be a poor way of saying this as any side displays so well. Minor edge and base contact which is expected and all display faces are clean. 4.6 x 3 x 3 cm. Great luster and a fine specimen. 90$
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OKB-909 Herkimer Diamond with Pyrite Stalactite Inclusions St. Johnsville Quarry, St. Johnsville, NY. This 8 cm Herk. has minor crystallized dolomite matrix and impressive pyrite inclusions to 2.5 cm. Stalactites are metallic black with gold flecks. They are mostly internal to the crystals but do protrude to surface at their bases. Highly unusual to find these inclusions in Herkimer diamonds. Very minor tip rub (less than .5 millimeters. 250$
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