Rare and elegant Mexican Psilomelane 15.5-24.5mm freeform beads (ETB00811)

Psilomelane

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:
smallest bead : 15.5 x 16 x 6.5 mm
the largest bead : 24.5 x 29.5 x 7.5 mm

- this is only an approximate

Length: 16.5 inches

Finishing: Polished