0.85 Ct. Bi Color Sapphire from Montana

This transparent 0.85 carat oval bi color sapphire presents a refined balance of size, color, and workmanship, and it is offered through The Natural Sapphire Company. The stone measures 6.20 x 5.30 x 3.35 mm, and it has been fashioned in a mixed brilliant cut, combining a brilliant style crown with a faceted pavilion to maximize light return and dispersion. Clarity is graded very very slightly included, evaluated at eye level, which confirms the stone is clean to the unaided eye, while still retaining natural internal character when examined under magnification. Color intensity is described as medium light, and the gem displays a gentle but noticeable division of hue that qualifies it as bi color, with subtle transitions that respond to changes in orientation and light. The surface finish is graded excellent polish, and the sapphire has undergone a standard heat treatment, disclosed here in full, to enhance clarity and stabilize color. The sapphire was sourced from Montana, and its origin contributes to the overall character and desirability of the stone.

The bi color nature of this sapphire is an important aspect to understand, and it is a primary factor in its rarity relative to similar options. Many sapphires that show distinct dual coloration are either smaller, less transparent, or present more saturated tones that limit versatility. This Montana specimen, at 0.85 carat and with medium light intensity, occupies a narrow category where size and color coexist without compromising transparency or brilliance. The warm and cool color zones within the stone are balanced rather than abrupt, creating an appealing visual gradient that reads differently under diffused daylight than under artificial light. In practical terms this means the gem can complement a wider range of metal choices and design treatments, while still maintaining an identifiable bicolor character, a trait that is uncommon among stones of this specific weight and clarity.

Cut and clarity are fundamental to the gem's performance, and the mixed brilliant cut has been executed to preserve weight while optimizing optical return. The crown facets contribute to scintillation and a lively face up appearance, while the pavilion faceting supports depth and contrast, delivering a crisp outline despite the stone's modest measurements. The clarity grade, very very slightly included in an eye level evaluation, indicates only minimal inclusions that do not interfere with the gem's visual appeal when set. Combined with excellent polish, these attributes produce a stone that reads clean and bright when incorporated into jewelry, and that will interact predictably with light. For designers and consumers who compare options, the combination of an oval outline, mixed brilliant faceting, and very very slightly included clarity at this carat and size is not commonly encountered, adding to its collectible and practical value.

Practical considerations include the disclosed heat treatment, which is a widely accepted enhancement in sapphire trade practices and serves to improve transparency and stabilize color. Care should follow standard sapphire recommendations, and routine cleaning using warm water, mild detergent, and a soft brush is appropriate, avoiding harsh ultrasonic treatment only if the mounting or accompanying materials dictate caution. For mounting, the stone's dimensions and oval shape make it suitable for solitaire styles, halo settings with small accent stones, and mixed metal designs where the bi color effect can be accentuated by contrasting metal tones. Collectors who value provenance will note the Montana origin, which is associated with a distinct palette and geological history, and The Natural Sapphire Company provides full disclosure on origin and treatment to support informed decisions. For those assessing rarity and suitability for bespoke designs, this 0.85 carat bi color Montana sapphire represents a restrained yet notable example of dual tone sapphire material, offering a rare combination of size, clarity, and color behavior in a single, well finished gem.