Shop Women's Thomas sabo Black size OS Bracelets at a discounted price at Poshmark. Description: Genuine Thomas Sabo Charm Club. Black Obsidian Bead Bracelet from Thomas Sabo. created from dark faceted black obsidian stones, strung on an elasticated band and finished with a sterling silver branded charm carrier clasp, perfect for adding your favourite charms.. Sold by josuea. Fast delivery, full service customer support.