0.63 Ct. Bluish Green Sapphire from Madagascar

This 0.63 carat emerald cut bluish green sapphire from Madagascar exemplifies deliberate lapidary control and natural rarity, presented by The Natural Sapphire Company. The stone measures 6.02 x 3.57 x 2.94 mm, a set of dimensions that places it in a highly desirable small to medium carat bracket for refined jewellery, while preserving a strong visual presence due to the step cut geometry. The emerald cut is executed as a classical rectangular step cut, with a broad table plane and parallel crown and pavilion facets that emphasize color and transparency rather than scintillation. The combination of a sizeable table and measured pavilion depth produces broad, even flash and color zoning, which in this instance reveals a complex interaction of blue and green tones across different angles of illumination. The cutting approach prioritizes color saturation and face up color stability, making this stone an excellent candidate for close set solitaire compositions where the stone is viewed primarily from the table.

From a color and grading perspective, this sapphire registers as bluish green with medium color intensity, a tone and saturation that is uncommon among sapphires of similar weight and cut. Bluish green sapphires occupy a narrow window on the spectrum between classic cornflower blue and emerald green, and when combined with a medium intensity they produce a look that can read as teal, ocean green, or deep sea blue depending on lighting and background. This gem displays moderate pleochroism, responding differently to polarized viewing angles, which is typical for corundum with mixed blue and green chromophores. Compared to typical blue sapphires that are commonly found in small sizes, or green sapphires that often present in paler tones, this specimen represents a less frequent color expression at this specific weight and in a precision emerald cut. The effect is a visually saturated face up color that remains lively without becoming overly dark or muddy, a balance that is hard to find in stones under one carat.

Clarity and finish are important for step cut stones because the broad facet planes expose internal features more readily than brilliant cuts, and this sapphire has been evaluated as slightly included at eye level, with excellent polish. Slightly included at eye level indicates that minor internal characteristics are present, but they do not significantly interrupt transparency or color flow when the gem is set and worn. In step cut stones these inclusions often appear as tiny crystal groups or linear features, and in this material they are located in positions that do not detract from the stone’s overall symmetry or table brightness. The excellent polish speaks to meticulous facet polishing, with crisp facet junctions and flat planes that maximize light transmission and allow the stone to exhibit clean, broad flashes. The lapidary work has been balanced to retain weight while producing even facet arrays, and the stone’s pavilion angles have been controlled to prevent undesirable light leakage, maintaining a pleasing depth of color.

This sapphire has been heat treated, a standard and stable enhancement in sapphire processing, and originates from Madagascar, a source known for producing a diverse range of corundum hues including highly sought after bluish green tones. Heat treatment in this context has been applied to enhance clarity and to stabilize the stone’s face up hue, improving color homogeneity while preserving the natural character that distinguishes Madagascar material from other origins. The combination of origin, treatment, cut, and size creates a rare offering, because it is uncommon to encounter a transparent, well polished, emerald cut bluish green sapphire in the 0.6 carat range that also shows medium color intensity and only slight inclusions visible at eye level. For the client seeking a distinctive center or side stone that reads as a sophisticated teal, this gem occupies a singular niche, and The Natural Sapphire Company has presented it as a collectible option for fine jewellery designs that emphasize color nuance, classical step cut geometry, and measured optical performance.