Ace of Diamonds Mine, Middleville, Town of Newport, Herkimer Co., New York

5.7 x 4.1 x 2.5 cm
2.2 x 1.6 x 1 in

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Collected in 1967.

The majority of the crystals on this specimen are black in color due to the inclusions of Pyrobitumen. Where the inclusions are not as heavy the color is shades of dark brown. A few of the crystals are clear at the termination and have phantoms. Pyrobitumen is a hydrocarban mineraloid which according to mindat is ":formed by polymerization of petroleum over geological time periods, therefore being related to petroleum the same way that amber is related to tree resin.":. The Quartz crystals have a high, glassy luster. From the bottom of the specimen can be seen two hollow areas.

Condition: Fairly Good

Flaws: There are a few small areas where the crystals are incomplete.

This mineral is also found in the following galleries: Minerals From New York, New Jersey and New England | Quartz | Borates and Hydrocarbons | Minerals with Inclusions | Minerals Priced Between 50 and 99 Dollars