Willemite, Calcite and Hydrozincite, Sterling Mine, Sterling Hill, New Jersey

This specimen from the Sterling Mine, Sterling Hill, New Jersey, shows a very unusual and interesting pattern of bright fluorescence due to its hydrozincite, Willemite and calcite content. Under short wave UV the hydrozincite fluoresces bright blue, the willemite green, and the calcite shows a typical red response. The willemite is also phosphorescent after short wave UV. The size of this specimen is 8.2 x 5.9 x 4.5 cm, and it weighs 414 grams.

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