1.79 Ct. Bi Color Sapphire from Ceylon (Sri Lanka)

This listing from The Natural Sapphire Company describes a transparent, oval shaped bi color sapphire weighing 1.79 carat, measuring 7.75 by 6.71 by 4.34 millimeters, and presenting a mixed brilliant cut. The sapphire is unheated and has received no post mining enhancement, a characteristic that preserves the natural crystallographic color zoning and the original surface condition. Clarity is graded as very very slightly included when evaluated at eye level, which means the stone offers clean visual transparency to the unaided eye while retaining small, internal characteristics that are consistent with natural corundum. Color intensity is described as very light, and the gem exhibits a subtle bi color distribution that can read differently as the stone is rotated, due to its pleochroic nature. The polish is excellent, and the faceting has been executed to maximize face up appearance and internal light return.

The mixed brilliant cut combines a faceted pavilion that encourages internal reflection with a crown suited to present bright, lively facets when viewed face up. In this sapphire the cut proportions and the excellent polish work together to create distinct pinpoint scintillation and broad flash patterns, which are visible across the oval table. The very light color intensity and the transparent body allow light to penetrate and reflect from multiple facet junctions, producing an open, airy presentation rather than a dense, saturated look. The bi color distribution is subtle, and in most lighting conditions the stone reads as a cool, near colorless to pale blue state with warm secondary tones that become apparent at certain angles. On the hand, as shown in the reference images, the gem sits with an elegant presence that complements refined settings, and its dimensions are well suited to classic solitaire or halo mounting styles.

When compared to more commonly encountered gemstones, this sapphire demonstrates a distinct balance between brilliance, durability, and natural character. Diamond will typically exhibit greater overall brilliance and fire due to its higher refractive index and dispersion, producing more pronounced spectral flashes. By contrast corundum, the mineral species to which sapphire belongs, has a lower refractive index and lower dispersion, so its fire is more restrained. This specific stone compensates for that inherent difference through its mixed brilliant cutting style and excellent polish, which accentuate contrast and scintillation rather than spectral fire. Compared with other transparent gems such as aquamarine or topaz, this Ceylon sapphire displays a firmer persistence of light return, and its hardness and toughness contribute to long term durability in wearable jewelry. The bi color aspect and natural, untreated origin further distinguish it from routinely heat enhanced sapphires, adding a layer of rarity that is visible in the way the stone shifts between cooler and warmer tones as viewing angle and lighting vary.

Provenance and treatment history are important when evaluating any natural sapphire, and this stone is documented as originating from Ceylon, Sri Lanka, with no post mining enhancement. That combination of origin and no enhancement preserves both the geological story and the material integrity of the gem, making it an appropriate choice for clients seeking natural character and stable performance. From a practical standpoint the weight of 1.79 carat and the 7.75 by 6.71 by 4.34 millimeter dimensions allow for versatile design options, and the mixed brilliant faceting will present attractively in both closed and open back settings. The very very slightly included clarity grade means routine cleaning and normal wear will maintain a clear face up appearance, and the excellent polish supports a lively surface sheen. For those comparing this stone to other options in its class, its combination of transparency, bi color interest, natural origin, and uncompromised surface finish create a gemstone that stands out for refined, understated brilliance and enduring appeal.