0.69 Ct. Color Change Sapphire from Ceylon (Sri Lanka)

This exquisite transparent color change sapphire weighs 0.69 carats, presenting a balanced and eye catching presence that is rare for stones exhibiting true color change. Measuring 6.60 by 4.65 by 2.81 millimeters, the oval shape is proportioned to maximize face up appeal while preserving weight from the rough, and the mixed brilliant cut has been chosen to enhance both scintillation and the stone s characteristic hue shift. Under incandescent lighting the gem reads more violet to purple, while under fluorescent lighting it shifts to a bluish violet, demonstrating the pleochroic and color change behavior that collectors prize. Clarity has been graded as very very slightly included when evaluated at eye level, which communicates that the stone is effectively eye clean, with only minute internal features that do not disrupt visual performance. The polish is excellent, ensuring that each facet boundary returns light cleanly to the viewer and supports the gem s lively appearance. This sapphire has been heat treated, a stable and widely accepted enhancement that optimizes color without compromising structural integrity, and its documented origin is Ceylon Sri Lanka, a source renowned for producing sapphires with lively tone and attractive saturation.

The weight of 0.69 carats is a key factor in this sapphire s rarity and value, particularly for a color change material. Carat weight in corundum has a nonlinear relationship with rarity, meaning that higher weights are progressively harder to find, and stones near three quarters of a carat with good color change are significantly scarcer than smaller pellets or calibrated sizes. Because sapphire is a dense mineral with a specific gravity around 4, small increases in millimeter dimensions produce appreciable jumps in carat weight, so the efficient planning and cutting required to retain 0.69 carats from rough material reflects both rarity and skill. For the educated buyer, the value proposition lies not only in the absolute weight but in how that weight supports the stone s color and clarity. At this size the gem offers a meaningful visual presence on a ring or pendant while still permitting a more refined and wearable design than many larger stones. The mixed brilliant cut helps concentrate return of light through the crown, amplifying the perceptible color change and making the most of the available carat weight. Heat treatment applied to Ceylon sapphires is industry standard, enhancing the desirable medium intense color intensity seen in this piece, and because the treatment is stable and permanent, it preserves long term aesthetic and market value.

When considering this sapphire for a purchase, collectors and buyers should appreciate the combination of technical attributes that The Natural Sapphire Company presents with full transparency. The 0.69 carat weight places this stone in an attractive category for both private collectors seeking color change material and for clients planning bespoke jewelry who want a gem with a distinctive optical personality without moving into higher carat price bands. The documented Sri Lankan origin contributes provenance and historical desirability, as Ceylon produces sapphires known for clarity and lively tones, and the very very slightly included clarity grade assures that the gem will read clean in most mounting orientations. Practical considerations for setting include designs that protect the girdle and pavilion while allowing light to enter the crown, choices that enhance the color shift and present the medium intense color at its best. As with any fine sapphire, standard care involves avoiding harsh chemicals and sudden extremes of heat, and the heat treatment this stone has undergone does not necessitate special handling beyond normal precautions. At The Natural Sapphire Company we stand behind the stated attributes of this sapphire, offering detailed imagery and measurement data so the informed buyer can assess how the 0.69 carat weight, the mixed brilliant cut, the excellent polish, the eye level clarity, and the Ceylon origin combine to create a rare and compelling gemstone that performs beautifully in jewelry and holds lasting appeal.