Rare and elegant Mexican Psilomelane 20-45mm freeform beads (ETB00841)
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: 20 x 21 x 6 - 45 x 44 x 8 mm
- this is only an approximate
Length: 9 inches