Glow in the Dark Stars on Mood Belly Ring. Show your true colors with this Mood Navel Ring. This Mood Ring will come alive with sensuous color as you wear it. Mood Jewelry changes color with minute variations in temperature. Specifications: 14 Gauge (1.6m. Specifications: 14 Gauge (1.6mm), 7/16" (11mm), .925 Sterling Silver, 316L Surgical Grade Stainless Steel, Genuine Thermo-Sensitive Liquid Crystal, Prong Set Gem. Handcrafted Glow in the Dark Silver Mood Belly Ring