Sphalerite under shortwave UV Light

Sphalerite, calcite, franklinite from Franklin, NJ under shortwave UV light. The sphalerite fluoresces orange, calcite red-orange and the franklinite is non-fluorescent. 1 1/4" x 1". Photo by WP.

Sphalerite, calcite, franklinite from Franklin, NJ under shortwave UV Light

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