Black at first glance but look deeply as carefully cut and polished rainbow obsidian stones, a form of volcanic glass, reveals a subtle rainbow of blue-green tones hanging from columns of crystal tourmaline beads. Hand-knotted onto black silk cord. EXTRAORDINARY EVENTS COLLECTION: Shimmering black spinel and tourmaline. Smoky quartz and prismatic labradorite. Sparkling golden metals. Conjure the feeling of special occasions on any day with these glittering heirloom jewelry styles. Lobster clasp. Length: 16” (41cm) Pendant: 3. 5" (9cm)