1.13 Ct. Bi Color / Parti Sapphire from Montana

This transparent 1.13 carat oval bi color parti sapphire presents a combination of size and coloration that is uncommon among comparable stones, particularly those sourced from Montana. At 1.13 carats this sapphire sits above the more frequently encountered range for parti sapphires, which are often found in smaller sizes where distinct color zoning can be more difficult to achieve without impacting transparency. The current gem displays well defined dual tones across its table and crown, producing a balanced visual presence that is rare to encounter in this weight class. The overall effect is a gem that reads as a cohesive, wearable size for fine jewelry while retaining the distinct parti character that makes this material sought after by collectors and designers.

The proportions for this specimen are precise, with dimensions 5.91 x 5.16 x 4.17 mm, and an oval outline that maximizes face up presence. The cutting style is faceted, executed in a mixed brilliant cut that combines pavilion faceting designed to return light efficiently, with crown faceting that articulates the bi color transition. The polish is graded excellent, producing crisp facet junctions and clean reflections across the table and crown facets. Clarity is graded as very very slightly included, evaluated at eye level, indicating inclusions are minimal and do not materially interfere with the gemian transparency or brilliance when set. The stone has undergone standard heat treatment, a common and stable enhancement applied to improve hue uniformity and overall visual appeal.

Color attributes are a primary distinguishing characteristic of this sapphire. The medium color intensity results in tones that are noticeable without tipping into saturation that could mask the parti nature, and the bi color distribution shows complementary warm and neutral zones that shift subtly with viewing angle and light source. Compared with typical parti sapphires that may exhibit muddy or poorly defined color separation, this example retains clarity and a refined palette, which allows both colors to be appreciable concurrently. The result is a rare interplay between color clarity and parti zoning, with the mixed brilliant cut serving to enhance the perceptual separation of tone while maintaining an integrated appearance.

Provenance is Montana, which provides context for the gem character and geological origin. Montana sapphires are recognized for producing a range of pastel to medium tones and for material that often exhibits pleasing clarity and unique color combinations. This particular 1.13 carat oval is notable for its convergence of attributes, namely uncommon weight for parti material, clean transparency, precise proportions, and professional cutting and finishing. For gemological documentation and design consideration this sapphire offers a balance between collector interest and practical application in jewelry, especially where a distinctive bi color effect is desired within a refined, wearable size. This offering is presented by The Natural Sapphire Company.