Ceylon Royal Blue Sapphire
Sapphire is the traditional September birthstone and has long been associated culturally with wisdom, truth, loyalty and protection. In some astrological traditions, blue sapphire is connected with Saturn, Capricorn and Aquarius. Such associations are cultural beliefs from ancient times.
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| Weight | 2.50 Ct |
|---|---|
| Dimensions | 9.54 × 6.99 × 4.40 mm |
| COLOR | Royal Blue |
| TREATMENT | Heated / Thermal Enhancement Detected |
| SHAPE | Oval Mixed Cut |
| VARIETY | natural blue sapphire |
| SPECIES | natural corundum |
| CLARITY | VVS (high grade) |
| QUALITY GRADE | High Quality |
| TRANSPARENCY | Transparent |
| ORIGIN | Ratnapura, Sri Lanka 🇱🇰 |
| CERTIFICATE | GIC – Gemological Institute of Colombo ( Gamintha Amarasena (FGA UK) & A. Sivakumar (FGA UK) ) |
| BIRTHSTONE | September |
| DESTINY NUMBER | 8 |
| PLANET | Saturn 🪐 |
| ZODIAC SIGN | Capricorn ♑, Aquarius ♒ |
| WEARING FINGER | middle finger of the right hand |
| WORN FOR | Good luck, wisdom, protection, mental clarity, and inner strength |
| SYMBOLIZES | Truth, loyalty, wisdom, protection, happiness, and lasting love |

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Ceylon Royal Blue Sapphire – 2.50 ct Heated Natural Sapphire from Ratnapura, Sri Lanka
What Is a Ceylon Royal Blue Sapphire?
This 2.50 ct Ceylon Royal Blue Sapphire is a natural corundum from Ratnapura, Sri Lanka, one of the world’s historically important sapphire-producing regions. Its transparent blue appearance, oval mixed cut and laboratory-described Royal Blue colour range give the gemstone the classic character sought in fine blue sapphire jewelry.
The sapphire measures 9.54 × 6.99 × 4.40 mm and has been fashioned into an oval mixed cut designed to display its rich blue colour and brilliance.
Gemological Characteristics
Species: Natural Corundum
Variety: Natural Blue Sapphire
Weight: 2.50 ct
Dimensions: 9.54 × 6.99 × 4.40 mm
Shape: Oval Mixed Cut
Colour: Royal Blue
Transparency: Transparent
Clarity: VVS / High Grade
Quality: High Quality
Origin: Ratnapura, Sri Lanka 🇱🇰
Hardness: 9 Mohs
Refractive Index: 1.762–1.770
Birefringence: DR 0.008
Specific Gravity: approximately 4.00
Optical Character: Doubly refractive
Pleochroism: Dichroic
Fluorescence: Inert under SWUV and LWUV
Microscopic examination recorded growth structures and dissolved silk inclusions.
Heat Treatment & Transparent Disclosure
Laboratory examination detected thermal enhancement. Heating sapphire is a long-established treatment used within the gemstone industry, commonly to improve colour and/or clarity characteristics.
For Danu Group, treatment disclosure is an essential part of transparent gemstone trading. This stone is therefore presented clearly as a natural, heated Ceylon blue sapphire, rather than an unheated sapphire.
Laboratory Certification
The sapphire is certified by the Gemological Institute of Colombo (GIC), Sri Lanka, with examination associated with gemologists Gamintha Amarasena (FGA UK) and A. Sivakumar (FGA UK).
The laboratory remarks state that indications of thermal enhancement were detected and describe the gemstone as bearing an attractive blue body colour. Its GIC colour guide classification falls within the “Royal Blue” range.
From Ratnapura, Sri Lanka
Ratnapura—literally associated with the “City of Gems”—sits at the heart of Sri Lanka’s historic gemstone industry. Ceylon sapphires from this region have been valued internationally for generations.
For collectors and jewelry clients, this sapphire combines a desirable size, classic oval form, transparent appearance and laboratory-documented Royal Blue colour classification.
Symbolism & Tradition
Sapphire is the traditional September birthstone and has long been associated culturally with wisdom, truth, loyalty and protection. In some astrological traditions, blue sapphire is connected with Saturn, Capricorn and Aquarius. Such associations are cultural beliefs from ancient times.
Q & A
Frequently Asked Questions
Yes. It is natural corundum identified as a natural blue sapphire.
Yes. Laboratory examination detected thermal enhancement. The treatment is fully disclosed.
Royal Blue is a trade and laboratory color description used for a rich, vivid blue appearance. In this case, the GIC color guide places the gemstone within its Royal Blue range.
The stated origin is Ratnapura, Sri Lanka, one of the country’s best-known gemstone-producing regions.
The sapphire weighs 2.50 carats and measures 9.54 × 6.99 × 4.40 mm.
It has an Oval Mixed Cut, combining different facet styles to balance brilliance, color, and overall appearance.
Yes. Heating does not make the gemstone synthetic. It remains a natural sapphire, but its treatment must be clearly disclosed.
Heat treatment is commonly used to improve or modify color and clarity by changing certain internal features within the stone.
The report notes growth structures and dissolved silk inclusions, which are consistent with the internal history of the gemstone and its thermal treatment.
The reported refractive index is 1.762–1.770, with double refraction of approximately 0.008.
Corundum has a hardness of 9 on the Mohs scale, making sapphire highly suitable for many types of fine jewelry.
It means the gemstone can show two slightly different colors or color intensities when viewed in different crystal directions.
The report states that it is inert under both short-wave and long-wave ultraviolet light.
Yes. Sapphire is very durable and commonly used in rings, earrings, pendants, and other fine jewelry. Proper setting is still important to protect the gemstone from impact.
Not necessarily. Royal Blue describes the visible color. A sapphire may naturally show a strong blue color or may have had its appearance improved through heating. Treatment status and color description should be considered separately.
Its species is Natural Corundum, and its variety is Natural Blue Sapphire.
It means light can pass through the gemstone sufficiently to allow the internal body and facet reflections to be seen.
Ratnapura has a long history of gemstone mining and is internationally associated with Sri Lanka’s alluvial deposits and sapphire production.
Yes. Independent gemological testing helps verify identity, treatment status, and other characteristics, giving buyers better transparency.
Its 2.50 ct size, Royal Blue appearance, oval cut, transparency, Sri Lankan origin, and laboratory documentation make it attractive for both fine jewelry and gemstone collections.
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