Natural Blue Sapphire · 1.28 ct · Oval · Cabochon · Heated · Sri Lanka

 1.116,06

Natural blue Sapphire weighing 1.28 ct, displaying a classic blue colour in an elegant oval cabochon. Measuring 6.0 × 5.2 × 3.6 mm, this translucent gemstone originates from Sri Lanka (Ceylon) and is recorded as heated. Individually documented by Natural Gems Belgium with its specimen-specific characteristics.

1 in stock

NGB Reference: NGB-000901 SKU: FA-NGBS024BC-003-003 Category: Brand:
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This individually documented natural blue Sapphire is presented by Natural Gems Belgium with its specimen-specific identification, measurements and recorded characteristics. Weighing 1.28 carats, this attractive gemstone displays a classic blue colour and originates from Sri Lanka, traditionally known in the gemstone trade as Ceylon.

The sapphire has been fashioned into an elegant oval cabochon, a smooth domed cutting style that emphasises colour, body appearance and the natural character of the gemstone rather than facet brilliance. Measuring approximately 6.0 × 5.2 × 3.6 mm, the stone has balanced proportions and a compact format suitable for jewellery or gemstone collecting.

Its translucent transparency gives the sapphire a soft visual depth, allowing light to penetrate the stone while maintaining a rich and concentrated blue appearance. With a recorded VS clarity, the gemstone presents relatively limited visible inclusions for a natural cabochon material, while still retaining the internal features expected of a naturally formed corundum crystal.

This Sapphire is recorded as heated. Heat treatment is a well-established practice for Sapphire and may be used to improve or stabilise colour and clarity characteristics. The treatment is fully disclosed as part of the specimen-specific documentation.

Sapphire belongs to the mineral species corundum, an aluminium oxide mineral valued for its durability, optical properties and wide range of colours. Blue Sapphire remains one of the most recognised and historically important varieties of corundum, with Sri Lanka being one of the world’s best-known sources of fine sapphire material.

As a natural gemstone, subtle inclusions, growth structures, colour variations or minor surface characteristics may be present. These features are part of the individual geological history of the stone and contribute to its unique identity.

Every gemstone presented by Natural Gems Belgium is individually documented according to its recorded identification, measurements and specimen-specific characteristics.

With its classic blue colour, Sri Lankan origin and softly domed oval cabochon form, this 1.28 ct natural blue Sapphire offers an elegant combination of natural character, colour presence and traditional gemstone appeal.

Overall Score: 84/100

NGB Grade: Very Good

Quality Evaluation

Color18.0/20
Clarity16.0/20
Cut16.0/20
Optical Performance17.0/20
Overall Appeal17.0/20

Evaluation Notes

This natural Sapphire presents a well-balanced cabochon profile with attractive blue colour, good visual presence and a pleasing overall dome. Its translucent body and slight natural inclusions remain consistent with the character of natural corundum, while minor limitations in surface finish or internal uniformity prevent a higher overall assessment. The gemstone nevertheless shows strong overall quality and a well-resolved appearance suitable for both collection and jewellery use.

Species

Corundum

Gemstone Variety

Sapphire

Gemstone Sub-variety

Blue Sapphire

Color

Blue

Shape

Oval

Cut

Cabochon

Treatment

Heated

Origin

Sri Lanka

Transparency

Translucent

Gemological Properties

Carat Weight1.28 ct
Dimensions6.0 × 5.2 × 3.6 mm
TransparencyTranslucent
ClarityVS
Refractive Index1.762 to 1.770
Specific Gravity3.97 to 4.05
Hardness9 Mohs
Birefringence0.008 to 0.010 (double refraction)
Crystal SystemCubic
LusterVitreous
Color DescriptionBlue
Transparency NotesTranslucent
Natural CharacteristicsVS clarity profile - Slight natural inclusions, internal growth features and subtle colour variations are visible within the stone. These characteristics are consistent with natural Sapphire and contribute to the individual appearance and geological identity of the gemstone.

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