DescriptionFLUORESCENT MINERAL SPECIMEN
Sterling Hill, Ogdensburg, New Jersey, USA
Originally worked for silver and zinc, the mines of Franklin, New Jersey are famous today as the source of some of the world's finest fluorescent minerals. This fine crystal was found in 1990 on the 430 foot level of the East vein of the Sterling Mine in a happy accident; a visitor to the mine tripped and fell into muddy water and came up with a rock that opened to reveal this marvel. This superb example exhibits a well developed hexagonal prism of tan willemite, accented by octahedral crystals of black franklinite and aesthetically perched on a cream-colored calcite matrix. It is quite attractive under normal indoor or daylight, but under shortwave ultraviolet light the approximately 3½ x 2 1/8 x 1 5/8 inch specimen luminesces a vibrant orange-red and green, activated by the presence of lead and manganese impurities (in the calcite and manganese in place of some of the zinc in willemite, respectively). Fine crystals of willemite are relatively rare to begin with; the aesthetics of this piece make it additionally appealing to the collector of not only fluorescents, but minerals in general.
Condition report available upon request.
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