A beautiful 2 row necklace, see the wonderful bronze flashes in the Obsidian rectangles.
Here’s your “little black number” necklace to go with that black dress.
The bottom row are Obsidian 15x18mm rectangles, with faceted Onyx spacer beads. A second row with Onyx and peacock grey 6mm Freshwater Pearls. These are joined into 2 banded Onyx ovals to make a single row of Onyx and Freshwater Pearls around the back, onto a silver T-bar clasp. All threaded by hand on beading wire, lengths are 21″ and 22″.
Obsidian is a natural volcanic glass. This is from a particular Lava, felsic lava, which has a high silica content. Coupled with rapid cooling, this results in forming a glass.