If the stars and mars aligned and were reimagined in a modern silhouette, this pink tourmaline necklace would reflect the extraordinary impact—with a scattering of lab-grown diamond accents for otherworldly sparkle. 10k white gold 4 x 2. 0mm marquise-cut pink tourmaline f color/vs2 clarity lab-grown diamond accents 18. 0-inch rope chain necklace; spring-ring clasp from the stellar star collection exclusive to zales