Rare and elegant Mexican Psilomelane 28-45mm freeform beads (ETB01217)

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: 28 x 22 x 8 - 45 x 36 x 8 mm
- this is only an approximate

Length: 9 inches

Finishing: Polished