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The Franklin-Sterling Hill area has more fluorescent minerals than anywhere else on Earth, and nothing is simple at this locality.
This checklist is not a treatise, so the descriptions are condensed and simplified. The most common fluorescent response is listed first. The UV wavelength or wavelengths listed for a mineral are those under which its fluorescence is brightest; “FL red SW” means that the mineral typically fluoresces red in shortwave UV, but may fluoresce less brightly under MW and/or LW. (Uncommon but significant fluorescences are in parentheses.) Subtleties such as fluorescent hue, saturation, and intensity are often overlooked.
For assistance in identification, the minerals are listed by assemblage, in brackets:
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[FM] = Franklin Marble
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[W] = weathering minerals
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[O] = zinc orebodies
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[V] = vein minerals
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[C] = calcsilicates
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[AC] = altered calcsilicates
Not all local minerals fit neatly into this scheme.
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{FO} = Franklin only
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{SHO} = Sterling Hill only​​​​​​​
CAVEAT: While mineral fluorescence can be a powerful tool for mineral identification, it should be used in conjunction with other identification techniques. Misidentifications based on fluorescence alone are common.
Fluorescent Minerals of
Franklin and Sterling Hill, N.J.
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