Alnöit (breccia) from Hoved-Alnö outside Sundsvall, Sweden
Drilled, hole app 1,5 mm
Since it is a natural stone all pieces are unique, but similar to those in the picture.
App size: A: 33 x 15 x 5 mm B: 23 x 17 x 5 mm C: 20 x 23 x 5 mm
Cultured pearls
Alnöit
