Iridium Spa - Greeting guests with a modern mix of cream, beige, and black hues, tactile natural materials, and soft, golden lighting, Iridium Spa reflects signature St. Regis refinement. This unrivaled attention to detail is also referenced in our staff’s commitment to providing a bespoke, transformative spa experience that recalls the spa’s namesake: Iridium. Signifying “rainbow,” Iridium comes from the Greek mythological goddess Iris, who is known to manifest as a rainbow on her journeys from sea to sky. Further, today Iridium is known as among the Earth’s most precious and rare elements.