If the stars and mars were reimagined in a modern silhouette, this pink tourmaline necklace would reflect the extraordinary impact—with a scattering of lab-grown diamonds for otherworldly sparkle. 10k white gold 6. 0 x 4. 0mm pear-shaped pink tourmaline 3. 5mm and 4. 0mm trillion-cut pink tourmalines graduated-size lab-grown diamonds; f color/vs2 clarity 1/3 ct. T. W. Lab-grown diamond accents 16. 0- to 18. 0-inch adjustable bead chain; lobster claw clasp from the stellar star collection exclusive to zales