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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:

  • [FM] = Franklin Marble

  • [W] = weathering minerals

  • [O] = zinc orebodies

  • [V] = vein minerals

  • [C] = calcsilicates

  • [AC] = altered calcsilicates

Not all local minerals fit neatly into this scheme.

  • {FO} = Franklin only

  • {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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