< back Perpetual Motion Sphere Duo Solo 6mm Ring $1,990 18k yellow gold, green tourmaline and malachite. Product code: PM-RN-DBSPSL details Set in Motion: discover the beauty in asymmetry with a tonal statement ring that juxtaposes a faceted green tourmaline against a perfectly round malachite that spins within a cutout cube. 6mm green tourmaline sphere (1.4ct) 6mm malachite sphere (2.4ct) Size & Fit Cube Length: 0.7cm (approximately) Ring Measurements can be found in the link below US sizing Product code: PM-RN-DBSPSL View Disclaimer size guide select color Yellow Gold W/ Citrine & Imperial Topaz Yellow Gold W/ Green Tourmaline & Malachite yellow gold w/ green tourmaline Yellow Gold W/ Malachite Select Size add to bag Share Twitter Facebook Email Pinterest Custom Order