Rare and elegant Mexican Psilomelane 13.5-15.5mm freeform beads (ETB00813)
Psilomelane, also known as black hematite, is a group name for hard black manganese oxides such as hollandite and romanechite. Psilomelane consists of hydrous manganese oxide with variable amounts of barium and potassium.
Dimensions of beads:
Size: 14.5 x 18 x 6 mm
- this is only an approximate
Length: 16 inches