1.54 Ct. Bi Color Sapphire from Montana

This Montana origin bi color sapphire offered by The Natural Sapphire Company is a transparent 1.54 carat oval, measuring 6.86 by 6.00 by 4.46 mm, with a mixed brilliant cut, excellent polish, and a clarity grade of slightly included when evaluated at eye level. The mixed brilliant configuration pairs a brilliant crown with a faceted step pavilion, a deliberate choice that balances intense scintillation from the crown facets with controlled color concentration from the pavilion steps. The measured depth of 4.46 mm on an average diameter of 6.43 mm yields a depth of approximately 69 percent, a proportion that favors face up color saturation and minimizes windowing while maintaining lively light return. The stone displays medium intense color intensity with distinct bi color zoning, and the heat treatment enhancement is a standard, stable practice used to optimize hue and uniformity in Montana sapphires. Slight inclusions are present, but they are localized and do not critically interrupt facet junctions or mirror surfaces, and the excellent polish ensures maximum surface luster and contrast across the table and crown facets.

When comparing brilliance to more common gemstones, this sapphire stands apart due to its combination of refractive properties, pleochroism, and expert cutting. Corundum has a refractive index near 1.76 to 1.77 and a low dispersion around 0.018, so unlike diamond with its high refractive index of 2.42 and strong fire, this sapphire produces restrained fire but superior broad white brilliance and mirror like flashes from its mixed brilliant crown. Against common gems such as quartz and topaz, which have lower refractive indices, the sapphire delivers markedly stronger luster and light return, and its Mohs hardness of 9 offers far greater durability. The bi color nature introduces observable pleochroic shifts as the stone is tilted, creating dynamic zonal contrast that accentuates facet scintillation more than a uniformly colored stone would. The medium intense color, supported by the depth proportion and the pavilion design, concentrates tone without choking brilliance, which is why connoisseurs who prioritize optical performance and color complexity will find this Montana sapphire exceptional. For clients seeking a technically refined, wearable stone with character and stable enhancement, this gem from The Natural Sapphire Company is a compelling choice.