0.79 Ct. Bluish Green Sapphire from Tanzania

This is a beautiful transparent bluish green oval sapphire weighing 0.79 carat, with dimensions of 5.68 by 5.11 by 3.27 millimeters, offered by The Natural Sapphire Company. The gem is fashioned in a mixed brilliant cut, combining a brilliant facet arrangement on the crown with a more traditional pavilion geometry, which produces an attractive balance of face up brilliance and depth of color. Color is described as bluish green with medium intensity, a tone that reads as lively and fresh under daylight and evening lighting. Clarity is graded very slightly included when evaluated at eye level, indicating small internal characteristics that do not detract from overall transparency or optical performance, and polish is excellent, meaning facets show crisp junctions and clean reflective surfaces. This sapphire is untreated, free of heat or other laboratory enhancements, a characteristic that increases desirability for collectors and buyers who prioritize natural state gems. The combination of its untreated nature, appealing bluish green hue, precise mixed brilliant cutting, and excellent polish places this stone in a category that is both wearable and collectible.

From a gemological and buyer perspective this sapphire carries several attributes that matter to educated purchasers. Being an untreated example from Tanzania adds provenance value, as Tanzanian deposits are recognized for producing a range of attractive corundum colors, and when a stone is both untreated and well cut, it preserves natural character and rarity. Clarity at very slightly included grade evaluated at eye level means most inclusions are minor and will not interfere with the gem when set, allowing the stone to deliver strong light return and sparkle. The mixed brilliant cut enhances scintillation, so the stone performs well as a focal gem in jewelry. Corundum ranks high in durability and daily wearability, which supports using this gem in rings, pendants, or earrings without compromising longevity. For a buyer attentive to craftsmanship and long term value, the untreated origin and high polish are important, because they speak to authenticity, minimal post mining alteration, and the potential for stable market appreciation.

When considering custom design pairings to complement this bluish green oval sapphire, several directions showcase its color and optical properties. For maximum contrast and visual impact, a halo of fine white round brilliant diamonds will frame the medium intensity bluish green and increase apparent size and brilliance, particularly when set in cool metals such as platinum or 18 karat white gold. For a tonal and botanical aesthetic, pair with small mint green or teal sapphires, or with vibrant green tsavorite garnet accents, arranged as offset shoulder stones or a graduated surround, which will harmonize with the bluish green without overpowering it. For a modern yet warm presentation, set the stone in yellow or rose gold with a delicate bezel to emphasize color depth and create a vintage inspired palette. Alternating small rounds of aquamarine or light green tourmaline with white diamond melee produces a soft graduated effect that highlights the stone central tone while adding lightness. Because the gem is an oval with mixed brilliant facets, round brilliant melee and small oval accents work best to maintain optical coherence. In practical terms this 0.79 carat sapphire makes an elegant solitaire for a refined engagement ring, a luminous pendant center, or a clustered cocktail ring, and our bench at The Natural Sapphire Company can propose precise layouts that preserve the stone face up depth, minimize visible inclusions, and ensure metal and accent choices enhance the sapphire color, rather than compete with it.