0.40 Ct. Bluish Green Sapphire from Montana

This gemstone is a transparent 0.40 carat round bluish green sapphire, precisely cut to dimensions of 4.44 by 4.43 by 2.91 millimeters, and presented in a mixed brilliant cut with an excellent polish. The mixed brilliant cut used here integrates brilliant crown faceting with a pavilion design intended to maximize both scintillation and face up color, creating an appealing balance between lively sparkle and even color distribution. Measured as a depth proportion of approximately 65.6 percent, this stone was cut to retain weight and preserve its natural color, while still delivering pleasing light return for close viewing and jewelry use. Clarity is described as very very slightly included when evaluated at eye level, indicating that the sapphire reads as essentially eye clean to most observers, with only minute inclusions visible under magnification or careful inspection. The excellent polish further refines the surface finish so that each facet edge is crisp, enhancing the gem s brilliance and allowing the bluish green hue to read cleanly across the table.

Color is one of the most compelling features of this sapphire. The light intensity bluish green tone is subtle and elegant, offering a delicate balance between blue and green that can appear more blue or more green depending on light and metal setting. This particular hue is characteristic of certain Montana sapphires, where chromium and iron concentrations produce the distinctive teal and bluish green palette that collectors prize. The stone has been heat treated, which is a widely accepted and stable enhancement in the trade, used to refine and stabilize color and improve clarity without significantly altering the natural character of the material. Heat treatment is a standard practice among reputable dealers and gem labs, and when disclosed it allows knowledgeable buyers to assess value accurately. The provenance from Montana adds an important dimension, because Montana sapphires are known for their unique, often pastel to medium intensity colors, and for the natural, earthy tones that set them apart from gemstones sourced in Sri Lanka, Madagascar, or Australia.

Rarity in this offering arises from the combination of size, color, and clarity. At 0.40 carats, this sapphire sits near the half carat range, which is a meaningful threshold for collectors and designers because larger clean Montana stones of this particular bluish green shade are scarce. Many Montana sapphires in the market are smaller or more heavily included, or they trend toward distinct teal or green without the balanced bluish green seen here. The very very slightly included clarity at eye level places this gem among a smaller subset of Montana material that is both transparent and eye clean, which enhances its value compared to more commonly available, included or heavily tinted examples. For the educated buyer seeking balance between rarity and practical wearability, a sapphire with the documented origin Montana, disclosed heat treatment, transparent body color, and an excellent finish represents an attractive investment in both aesthetic and collectible terms. The mixed brilliant cut, combined with the stone s clean appearance, also makes it easier to integrate into fine jewelry designs without sacrificing brightness or symmetry.

Practical considerations for use and care are straightforward, and The Natural Sapphire Company is prepared to assist with mounting and certification. This 0.40 carat round bluish green sapphire is ideal as a delicate solitaire for a minimalist engagement ring, as an accent stone flanking a larger center gem, or as the focal point in a refined pendant or pair of studs. Metal choice will influence the perceived hue, with yellow and rose gold adding warmth that emphasizes greenish notes, and white gold or platinum accentuating the blue component and brightening the overall face up appearance. Because the stone is heat treated and polished to a high standard, normal jewelry care applies. We recommend routine cleaning with warm soapy water and a soft brush to remove surface oils, and professional inspection before attempting ultrasonic or steam cleaning, especially for older settings or jewelry with multiple components. For buyers who require additional assurance, The Natural Sapphire Company can provide further documentation, high resolution imagery, and independent gemological reports upon request, enabling confident purchase decisions based on verifiable data and provenance.