0.40 Ct. Yellow Sapphire from Ceylon (Sri Lanka)

This transparent yellow sapphire weighs 0.40 carat and presents a cushion shape with dimensions 4.36 by 3.95 by 2.66 mm. The cutting style is faceted with a mixed brilliant cut that balances large facet planes and smaller pavilion facets to maximize scintillation and return of light. The stone displays a light color intensity that reads uniformly across the table, and the clarity has been evaluated as very very slightly included when viewed at eye level, which indicates minimal visible inclusions and high transparency. The polish on every facet is excellent, contributing to crisp facet junctions and a bright face up appearance. The proportions produce an overall depth of approximately 64 percent, which supports strong light performance and a sense of visual spread relative to the measured diameter.

The 0.40 carat weight is an important determinant of both value and rarity for natural sapphires, and it is useful to consider how weight interacts with other quality factors. Gemstone markets typically price sapphires on a per carat basis that increases with size, and scarcity increases significantly as stones pass through common weight thresholds such as 0.50 carat and 1.00 carat. Each incremental increase in carat weight represents a larger volume of corundum that is free from significant inclusions and suitable for fine cutting, and that incremental rarity is reflected in price. In the case of this 0.40 carat cushion, the combination of a precise mixed brilliant cut, high clarity at eye level, and excellent polish means that its presence on the finger or in a piece of jewelry reads larger and more luminous than the raw weight alone might suggest. The careful cutting maximizes table size and face up area while maintaining adequate depth, producing a visual impact that leverages the 0.40 carat weight efficiently. For collectors and designers who value optical performance and material quality as much as absolute carat weight, this balance of attributes supports a value profile that is stronger than the numerical weight might imply when considered in isolation.

Provenance and treatment are relevant to the stone s market position and to expectations for durability and long term appearance. This sapphire is heat treated, which is a widely accepted and stable enhancement used to improve color uniformity and remove certain inclusions without compromising the inherent durability of corundum. The origin is Ceylon Sri Lanka, a source historically associated with sapphires that exhibit fine clarity and lively, clean tones. Sri Lankan yellow sapphires are appreciated for their clear, transparent qualities and for their suitability to a wide range of settings. The light color intensity of this stone pairs well with warmer metal tones and with open settings that allow light to enter and exit freely, and it can be used as a subtle center stone or as a refined accent in a multi stone composition. At The Natural Sapphire Company we document origin and treatments to provide clear information for designers and collectors, and to place the 0.40 carat weight in context with the stone s clarity, cut, and provenance to aid informed selection.

Considerations for setting and design should emphasize the attributes that enhance perceived size and value. A well proportioned cushion with a mixed brilliant cut benefits from mounting styles that expose the pavilion and allow motion to create scintillation, and settings that provide minimal bezel coverage on the crown will preserve face up area and optical performance. The very very slightly included clarity grade at eye level means the stone will read clean in everyday wear, while the excellent polish supports consistent brilliance under different lighting conditions. From a rarity perspective, natural stones of this weight and quality from Ceylon Sri Lanka are less common than smaller commercial material, and the precise cutting and finish applied here concentrate the available weight into optimal visual return. This sapphire represents a measured balance of carat weight, craftsmanship, and provenance, offering a refined option for projects that prioritize optical quality and documented origin.