Location Found: Franklin
 Year Discovered: 1817
 Formula: MnO
 Essential Elements: Manganese, Oxygen
 All Elements in Formula: Manganese, Oxygen
 IMA Status: Valid - first described prior to 1959 (pre-IMA) - "Grandfathered"
 To find out more about this mineral at minDat's website, follow this link   Manganosite

Dunn, Pete J. (1995). Franklin and Sterling Hill New Jersey: the world's most magnificent mineral deposits. Franklin, NJ.: The Franklin-Ogdensburg Mineralogical Society. p.600

Frondel, Clifford (1972). The minerals of Franklin and Sterling Hill, a checklist. NY.: John Willey & Sons. p.67

The Picking Table References
 PT Issue and PageDescription / Comment
View IssueV. 32, No. 1 - Spring 1991, pg. 15Mineral Notes, Research Reports, Manganese-Rich Ore Assemblages, Manganosite (small description)
View IssueV. 15, No. 2 - August 1974, pg. 8Fluorescent Corner - Margarosanite
View IssueV. 10, No. 2 - August 1969, pg. 11Mineral Notes - Rhodochrosite/Manganosite

Manganosite, foliated zincite and sonolite from Franklin, NJ
Manganosite (dark green), foliated zincite (dark red) and sonolite (pink brown) from Franklin, NJ. 3 3/4" x 2 3/8". From the collection of, and photo by Robert A. Boymistruk.

All content including, but not limited to, mineral images, maps, graphics, and text on the Franklin-Ogdensburg Mineralogical Society, Inc. (FOMS) website is licensed under a
Creative Commons Attribution-NonCommercial 4.0 International License.
Creative Commons License