Accent Stones Paraiba Tourmaline Ring 0.31 Ct., 18K White Gold

This GIA certified Greenish Blue paraiba tourmaline from Brazil is a precision calibrated gem, weighing 0.31 carat, with oval dimensions 5.15 x 3.34 x 2.50 mm. The mixed brilliant cut employs a brilliant facet arrangement on the crown paired with a controlled pavilion design to balance scintillation and color saturation, producing lively return of light without sacrificing the stone body color. The length to width ratio is approximately 1.54 to 1, creating a modestly elongated oval silhouette that suits both solitaire and halo settings, while the depth measures approximately 58.9 percent of the average diameter, a proportion that supports optimal light performance for this material. Clarity is graded slightly included, evaluated at eye level, which is typical for natural paraiba tourmalines and can provide internal character without significantly impacting brilliance. Medium color intensity describes a stable greenish blue tone enhanced by copper trace elements, and the gem displays pleochroism with blue green and greener directions that respond to orientation in the mounting. The surface finish is an excellent polish that maximizes facet contrast and edge crispness, and the stone has undergone standard heat treatment to stabilize hue, consistent with trade practice. Refractive properties for tourmaline, about 1.624 to 1.644, combined with this cut geometry, deliver controlled brilliance and a lively, neon influenced presence under both daylight and artificial lighting.

When designing a custom piece around this paraiba, consider settings and companion stones that amplify the electric greenish blue while respecting the gem proportions. A fine pavé halo of small round brilliant diamonds will increase perceived size and add white light contrast, while tapered baguette or trilliant side stones in near colorless grades will accentuate the oval axis and preserve the clean modern lines. For color play, pairing with saturated blue sapphires will deepen the cool hue family, whereas medium to vivid tsavorites will emphasize the green component for a bicolor effect. Metal choice alters perceived color, with platinum or white gold lending a crisp, neon presentation, and 18 karat rose gold introducing subtle warmth that will shift the apparent tone toward greener, more pastel nuances. For practical setting technique, a four or six prong head maximizes light entry and shows pleochroism, while a low partial bezel can protect the girdle and emphasize color by creating internal reflections. The Natural Gemstone Company can provide matching accent stones and develop CAD renders to test combinations, ensuring the final jewelry piece aligns with optical performance and aesthetic intent.