1.72 Ct. Color Change Sapphire from Tanzania

This specimen is a transparent 1.72 carat oval color change sapphire, with dimensions 7.69 x 5.60 x 4.66 mm, cut in a mixed brilliant style to balance fire and color. The gem exhibits vivid color intensity, demonstrating a clear shift from a deep blue in cooler light to a rich violet under warmer lighting, a characteristic that distinguishes it as a true color change sapphire. Clarity is graded as very slightly included, evaluated at eye level, with the inclusions not affecting the overall visual appeal when set. The polish is excellent, providing crisp facet junctions and strong light return across the table. There has been no enhancement to this stone, and its origin is Tanzania, a detail that contributes to the gemological and geographic provenance available from The Natural Sapphire Company.

The oval outline and the specific dimensions of this sapphire make it particularly well suited to custom jewelry work, where proportion and scale are critical. At 7.69 mm by 5.60 mm the gem occupies a classical oval footprint that translates into a balanced face up area for a variety of mounting types. The 4.66 mm depth indicates a robust pavilion that supports secure bezel or prong engagement without excessive rise above the mounting plane, while preserving the mixed brilliant facet arrangement responsible for scintillation. For designers and bench jewelers, these dimensions are convenient when planning the setting gallery, prong placement, and shoulder profiles, and they accommodate common ring head sizes and pendant bezels without need for extensive modification.

From a design and durability perspective the stone is an excellent choice for pieces intended for regular wear. Sapphire is a 9 on the Mohs hardness scale, which makes it appropriate for rings, pendants, and bracelets when mounted with sound craftsmanship. The natural, unenhanced state of this Tanzanian sapphire also provides value for clients seeking untreated material for heirloom and bespoke commissions. The mixed brilliant cut produces a mix of small and larger facets that read well set beneath a table, and the very slightly included clarity grade when evaluated at eye level allows for confident placement in open settings so that the color change remains the visual priority. Careful orientation of the stone within the setting will maximize the face up color that the wearer prefers, and choices in metal color will further influence the perceived hue.

In practical terms this sapphire is ideal as a center stone for a custom engagement ring, a solitary pendant, or a tailored pair of earrings where a single focal oval is desired. The oval shape offers a flattering elongated silhouette that can visually slim the finger when set as a ring, while the size is large enough to be impactful on its own or to serve as the central element in a halo or three stone composition. The strong polish and vivid color intensity will interact well with white metals to emphasize brilliance, and with warmer metals to subtly enhance the purple modulation under incandescent light. Provenance from Tanzania and the absence of enhancement are tangible attributes to document for clients who value traceable and natural gemstones. For bespoke design inquiries and specific mounting recommendations, The Natural Sapphire Company can provide measured drawings and professional setting guidance to ensure the final piece honors the gemology and aesthetic potential of this color change sapphire.