
1) Manganese mineral 2) Monoclinic mineral
Found on
https://www.crosswordclues.com/clue/sussexite

Sussexite is a manganese borate mineral MnBO2(OH). Crystals are monoclinic prismatic and typically fibrous in occurrence. Colour is white, pink, yellowish white with a pearly lustre. It has a Mohs hardness of 3 and a specific gravity of 3.12. It is named after the Franklin Mining District in Sussex County, New Jersey, USA where it was first discov...
Found on
http://en.wikipedia.org/wiki/Sussexite

white to straw-yellow borate mineral, basic manganese borate [MnBO2(OH)]. Magnesium replaces manganese in the crystal structure to form the similar ... [1 related articles]
Found on
http://www.britannica.com/eb/a-z/s/192
No exact match found.