6.58 Ct. Blue Tanzanite from Tanzania

This 6.58 carat oval blue tanzanite from Tanzania presents a refined combination of size and purity, measuring 14.16 by 10.02 by 6.81 mm, faceted in a mixed brilliant cut that balances scintillation and depth of color. The stone is transparent and graded eye clean at typical viewing distance, with vivid color intensity and an excellent polish that allows light to return richly from the pavilion and crown facets. There is no enhancement, which preserves the natural character of the material and ensures stability over time. Visually the tanzanite displays an intense, saturated blue with strong internal brightness, making it well suited as a prominent center gem for dress rings, pendants, and bespoke statement pieces, The Natural Gemstone Company can provide detailed imagery and handling notes to assist in selecting a mounting that protects the pavilion while showcasing the oval outline and facet pattern.

When designing a custom piece around this tanzanite, consider metal and accent choices that either amplify its cool blue tone or introduce deliberate contrast. Platinum or 18 karat white gold settings will emphasize the pure blue and enhance perceived brightness when paired with colorless round brilliant diamonds as a halo or as tapered shoulder stones, creating a classic and highly wearable aesthetic. For a more contemporary or vibrant composition, select small vivid green tsavorite garnets or mint tourmalines as accent stones to introduce complementary contrast, or warm champagne diamonds and yellow gold accents to produce a rich, vintage inspired palette. A low prong or bezel rim will secure the stone while preserving its clean sightlines, a four or six prong oval crown will maximize light performance and allow the mixed brilliant cut to show strong scintillation. Consider a three stone configuration with elongated side stones to accentuate finger length, or a solitaire pendant set in a simple bezel for everyday refinement. For coordinated sets, matching smaller ovals or paired round accents can be used to create balanced earrings or a companion pendant. Our team at The Natural Gemstone Company can advise on proportion and prong placement to protect the girdle and pavilion, and can assist in selecting measured accent sizes that maintain optical balance with the 6.58 carat center, ensuring a finished piece that is both technically sound and visually harmonious.