| We believe this is the first reported occurrence of vivianite in western Tennessee. |
| This polished section of a tooth crown reveals figure-eight patterns of the blue mineral vivianite, a phosphate of iron. |
| Alteration of this mineral has produced an unusual abundance of vivianite coatings on fracture surfaces in the rock. |
| Occurrences of gypsum crystals and vivianite in drift are also noteworthy. |
| A new addition for MSH in 2006, it is the Ni end member of the Ni-Co series with erythrite, within the vivianite group. Normally similar in habit and physical properties to erythrite. |
| Other important phosphorus-bearing minerals are wavellite and vivianite. |
