CZ Trinity Knot Heart Pendant. This is such a beautiful piece! Our Pewter CZ Trinity Knot Heart Necklace on 18″ Chain features a Trinity knot blooming like a flower at the center of a CZ encrusted heart. Highly polished Sterling silver over lead-free pewter throughout. Treat yourself or gift a friend with this gorgeous and very affordable piece! Sterling silver over lead-free pewter. 16 clear CZs. 1 1/4″pendant length.