0.35 Ct. Blue Sapphire from Ceylon (Sri Lanka)

This cushion shaped blue sapphire weighs 0.35 carat and measures 4.80 x 3.61 x 2.18 millimeters, a compact gem with an expansive face up relative to its weight, originating from Ceylon Sri Lanka and offered by The Natural Sapphire Company, The cutting style is faceted and follows a mixed brilliant philosophy, the cutter employing a modified brilliant crown coupled with a precision faceted pavilion that balances larger mains with smaller star and kite facets to optimize both color saturation and scintillation, the result is a gem that reads richly blue at a glance while retaining lively surface sparkle, the stone exhibits a medium color intensity, the polish is excellent, and the clarity is graded slightly included when evaluated at eye level, the gem is natural with no enhancement which preserves the original crystal characteristics valued by connoisseurs.

From a cutting and light performance perspective this sapphire presents several technical virtues, the pavilion depth of 2.18 millimeters yields an approximate depth percentage of 52 percent which creates a relatively shallow to medium profile that expands the visible table area for a stronger face up presence, the mixed brilliant arrangement concentrates small high angle crown facets to generate crisp scintillation while broader pavilion facets manage internal light paths to reinforce color saturation rather than disperse it, excellent polish and accurate facet junctions minimize windowing and light leakage so that the gem returns light evenly across the table and crown facets, the faceting geometry in this cushion shape produces a balance between lively pinpoint scintillation and broader flashes of color which is particularly effective in blue sapphires where controlled light retention enhances perceived depth.

When compared to more common gemstones the optical character of this sapphire is distinct, sapphires have a refractive index of about 1.76 to 1.77 and a low dispersion of approximately 0.018 which yields less fire than diamond, diamond with a refractive index of 2.42 and dispersion around 0.044 displays stronger white light return and rainbow fire, this sapphire does not aim to emulate diamond fire, instead it offers saturated blue tone, internal contrast and pleochroic color separation that produce a velvety brilliance, compared with blue topaz and aquamarine which have lower refractive indices and generally paler, more pastel color, this Ceylon sapphire displays a richer blue with better light retention and stronger contrast, compared with spinel which has a similar but slightly lower refractive index, the sapphire demonstrates more complex color behavior due to weak pleochroism which can show differential blue intensity when viewed from different angles, the no enhancement status further elevates its appeal to buyers who prioritize natural provenance and unaltered optical properties.

In practical settings this sapphire will project clear personality in solitaire designs and will interact particularly well with open gallery settings that allow light to enter the pavilion and return through the crown, the relatively shallow to medium depth and generous table make the gem appear larger on the finger than its weight might suggest while the mixed brilliant faceting preserves sparkle under varied lighting, the slight inclusions observed at eye level do not materially interfere with transparency and serve as natural fingerprints that confirm the stone is unheated and naturally formed, when matched with precise mounting work and a complementary metal color this Ceylon cushion will read as a vivid, classic blue with controlled brilliance, The Natural Sapphire Company offers this stone as a technical and aesthetic choice for buyers who appreciate nuanced cutting strategy, authentic origin, and uncompromised natural color.