Set of Three Black Tourmaline Schorl Free Form Bead Necklace from Brazil - 17.5"

This is a set of three choker really nice Black Tourmaline (also known as Schorl) bead necklaces from Brazil.
Each necklace is 17.5" long and made from irregular shape free form nugget polished beads measure up to 10 mm. It is in great condition, and has natural, untreated color.
Average Strand Size: 45 Centimetre with clasp each
Average Strand Weight: 22.5 grams combined
Closure: Lobster claw clasp
You will get a set similar to the ones in the pictures.
Location: Minas Gerais, Brazil