Blue Lace Agate Earrings Delicate Blue Lace Agate rondells sparkle with their banded blue hues next to Black Diamond Swarovski crystal and sterling silver accents in these Blue Lace Agate earrings. Details # Total drop: approximately 1" from earwire # Sterling silver french hook earwires # All sterling silver components # Blue Lace Agate rondells measure 8mm # Swarovski crystals measure 4mm