The Sterling Hill Mining Museum in Ogdensburg, NJ, is renowned for its diverse mineralogy, with over 360 species found there, including over 90 fluorescent varieties. The primary ore deposits consist of zinc (willemite), iron (franklinite), and manganese (zincite). It is famed for brilliant fluorescent minerals, such as calcite (red) and willemite (green). [1, 2, 3, 4, 5]

Key Minerals Found at Sterling Hill:

• Willemite: The primary, highly fluorescent (green) zinc ore.

• Franklinite: A major iron-zinc-manganese ore.

• Zincite: A rare, valuable red oxide of zinc.

• Calcite: Known to fluoresce vibrant red/pink.

• Esperite: Fluoresces bright canary-yellow.

• Hardystonite: Fluoresces a distinct dark violet-blue.

• Hydrozincite: Fluoresces electric blue. [1, 2, 3, 4, 5]

Museum Highlights:

• Fluorescent Mineral Room: Displays hundreds of local and international fluorescent specimens.

• Mine Run Dump: A collecting area for visitors to find their own fluorescent specimens.

• Zobel Hall Mineral Gallery: Showcases collections of ores and other minerals. [1, 2]

The site was formerly a major zinc mine (closing in 1986) that operated for over 200 years and is considered one of the world's most mineralogically complex sites. [1, 2]