0.70 Ct. Blue Sapphire from Ceylon (Sri Lanka)

Long before any human hand touched it, this Ceylon blue sapphire began its story as a fragment of mineral deep within ancient metamorphic formations, where heat and pressure folded chemical rhythms into crystalline order. Over millions of years layers of corundum gathered trace elements that would one day translate into that unmistakable blue, and in that slow geological choreography a stone was shaped whose final weight would become central to its identity. The 0.70 carat weight of this cushion shape sapphire is the product of that patient process, and it is the precise measure by which nature and time converge into a jewel that both occupies space and carries meaning. From the hills of Sri Lanka where the name Ceylon evokes a long history of revered sapphires, to careful hands that recognize the value of each tenth of a carat, this gem arrives at The Natural Sapphire Company as a witness to geological time and human care.

When miners recovered the rough crystal it was selected for potential rather than perfection, and that selection set the path toward the elegant mixed brilliant cushion you see now. Cut to dimensions of 5.11 x 5.04 x 3.14 mm, with a face up presence that exceeds what its weight alone might suggest, the stone balances depth and spread in a way that maximizes color and light return. The mixed brilliant cut is a deliberate choice, allowing the pavilion facets to work with the crown facets to produce scintillation and an even distribution of tone across the table, and the cushion outline introduces a soft, vintage silhouette that flatters many settings. At 0.70 carat the sapphire sits in a very appealing weight class, substantial enough to be noticed on the hand while still retaining an intimacy of scale that suits fine, refined mounting styles. Because gem markets value not just size but the relationship of size to color and clarity, the exact carat weight becomes part of the rarity equation, with stones near this weight holding disproportionate desirability when they combine good color, fine clarity, and an accomplished cut.

Clarity for this sapphire is graded as very very slightly included, evaluated at eye level, which means that the inclusions are minimal and do not interfere with the gemological virtues that make sapphires treasured. The transparency of the stone is beautiful, and with an excellent polish every facet edge reads cleanly, allowing light to pass and return with lively contrast. Color intensity is described as medium intense, a tone that captures the classic Ceylon character, showing a vibrant blue that breathes and shifts under different lights rather than locking into a flat hue. This natural personality of color is further stabilized by a conventional heat treatment, a long standing enhancement in the trade that harmonizes and deepens blue tones without compromising the sapphire status as a natural gem. Heat treatment is widely accepted, and when combined with a high grade of cut and polish, it leaves a stone that feels wholly alive and natural to the eye while offering enhanced saturation that many customers find irresistible.

The weight of 0.70 carat is a decisive factor in the value narrative of this sapphire, and when you consider how rarity scales in the sapphire world the significance becomes clear. Sapphires of fine character are less common as carat weight increases, and because people often seek specific thresholds in size when selecting engagement gems or heirloom pieces, a stone that sits at a distinctive weight can carry a premium beyond what a simple per carat multiplication might predict. In practical terms the extra hundredths of a carat contribute to face up presence, structural depth for cutting, and market desirability, and for a collector or buyer who understands proportion and balance the 0.70 carat sapphire offers a resonance of rarity and value. At The Natural Sapphire Company we consider these aspects when curating our collection, and we present this Ceylon cushion as a gem with not only a beautiful look and feel but a story of measured scarcity, expert cutting, and provenance that together create a piece ready to be set into an enduring design. If you imagine this sapphire in a ring, pendant, or bespoke piece, its weight will translate into a presence that reads as both elegant and significant, a testimony to nature and craft combined.