Tiny Swarovski sphinx clasp

A tiny gem of a clasp, the Swarovski sphinx is mysterious, showing many colors in different times and lights. Is it green? Is it blue? Is that a hint of yellow I see? The sphinx smiles mysteriously and never tells. The centerpiece is 12 mm and the clasp is 27 mm from ring to ring. The Swarovski is vintage and is set in a hand-made sterling silver box clasp.