Buying a loose gemstone gives you independence, you get the freedom to make your own choice, your own jewelry design.
An exceptional 8.09 ct Blue Ceylon Star Sapphire from Sri Lanka (Ceylon), completely unheated, with a GIA Sapphire Origin Report (#2233980218). This stone displays a six-rayed asterism — a sharp, silver-white star that crosses the center of the cabochon dome when the stone is illuminated by a single directional light source. The blue body color is the classical, most sought-after color for star sapphires, and at 8.09 carats, the star is visible at full room-length viewing distance. Among the rarest combinations in the phenomenon gemstone market: large size, Ceylon origin, unheated, and GIA documentation.
STAR WILL ONLY BE SEEN UNDER DIRECT SUNLIGHT OR FLASHLIGHT.
Expert Opinion
Ahmed Shareek's Assessment
"An 8+ carat unheated blue star sapphire with a sharp, GIA-confirmed six-ray star and GIA-confirmed Ceylon origin is a genuinely rare combination — stones that bring together this size, this star quality, and full GIA origin documentation come along only a handful of times a year. This is the flagship phenomenon stone in this batch."
Rarity Analysis
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A True Phenomenon Gem: The asterism itself is the primary rarity driver here — a sharp, complete six-ray star (GIA-confirmed) requires a very specific density and alignment of fibrous rutile "silk" inclusions formed during the corundum's growth, a combination nature produces far less often than the clean material used for standard faceted sapphires.
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Exceptional Size: At 8.09 carats, this stone is large for any star sapphire — let alone one with GIA-confirmed Ceylon origin. Fine star sapphires of this scale, with strong asterism intact, are uncommon at any price point.
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Unheated Status: The majority of sapphires on the market today are heat-treated, and heating is generally understood to risk disrupting the fine rutile silk responsible for asterism. An unheated stone with a strong, sharp star intact is independently rare — this stone carries GIA confirmation of no indications of heating.
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GIA Origin Report Confirms Both Origin and Phenomenon: A single GIA Sapphire Origin Report (#2233980218) verifying Ceylon origin AND the six-ray asterism is a genuine differentiator — most phenomenon stones in the market carry no such combined, independent documentation.
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Classic Blue Color: Blue is the most traditional and historically prized star sapphire color, adding to the stone's collectibility alongside its rarity in size, treatment, and phenomenon.
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Combined Effect: The convergence of a sharp, GIA-confirmed six-ray star, 8+ carat size, unheated status, confirmed Ceylon origin, and classic blue color in a single stone places this piece among the rarest tiers of the star sapphire market.
Buying Guidance
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Viewing Conditions Matter: This star is only visible under a single directional light source — direct sunlight or a flashlight beam. Under diffuse indoor lighting the star will not appear; this is expected behavior for all star sapphires, not a flaw specific to this stone.
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Judge Star Quality Carefully: Look for sharpness, centering, and completeness of all six rays — a star that is faint, off-center, or missing rays is lower quality than one with a crisp, complete, well-centered asterism like this stone's.
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Translucency Is Normal: Cabochon-cut phenomenon stones are translucent by nature — the very rutile silk structure that produces the star also scatters light through the stone. This is expected for a stone of this type, not a clarity defect.
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Verify Natural Origin: Confirm any star sapphire is natural — not synthetic, diffusion-treated, or assembled/foil-backed to imitate a star — through independent lab documentation. This stone's GIA Sapphire Origin Report confirms it is natural, unheated, and Ceylon in origin.
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Try Before You Buy: Because the star's appearance depends entirely on lighting conditions, we recommend using our Try-On service to see the asterism in your own hand and light before committing.
Learn More About This Gemstone
Gemstone Data — At a Glance
| Item # |
CG8440 |
| Carat Weight |
8.09 ct |
| Species / Variety |
Natural Blue Star Sapphire (Corundum) |
| Shape / Cut |
Oval, Double Cabochon |
| Dimensions |
12.84 × 10.37 × 5.96 mm |
| Color |
Blue |
| Phenomenon |
Six-ray asterism, GIA-confirmed |
| Treatment |
Unheated — No Indications of Heating |
| Origin |
Sri Lanka (Ceylon), GIA confirmed |
| Transparency |
Translucent |
| Hardness |
9 (Mohs) |
| Certification |
GIA Sapphire Origin Report #2233980218 |
Why Choose this 8.09 ct Blue Ceylon Star Sapphire?
Large blue star sapphires above 5 carats in unheated quality from Ceylon with GIA documentation represent the premium tier of star sapphire collecting. At 8.09 carats, the star has the scale to command any jewelry piece it is set in, and the GIA report (#2233980218) confirms the weight, dimensions, treatment status (unheated), and origin. The blue body color is the traditional, classic star sapphire color prized since antiquity.
Key Benefits of this Natural Star Sapphire
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Unheated Ceylon Origin
No thermal treatment — the asterism and body color are entirely natural. GIA report #2233980218 confirms treatment status and origin.
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Sharp Six-Ray Asterism
A complete, sharp six-rayed silver star visible under any single directional light source.
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Exceptional 8+ Carat Size
The asterism is visible at room distance at this scale — a commanding statement stone.
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Blue Body Color
The classic, most traditional star sapphire color — timeless and instantly recognizable.
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Hardness: 9 on the Mohs scale
Corundum durability appropriate for any jewelry application.
Features
- Carat Weight: 8.09 Carats
- Gem Type: Natural Blue Star Sapphire
- Variety: Blue Star Sapphire
- Dimensions: 12.84 x 10.37 x 5.96 mm (per GIA report)
- Shape: Oval
- Cut Style: Double Cabochon
- Origin: Sri Lanka (Ceylon), confirmed by GIA
- Treatment: Unheated — No Indications of Heating (per GIA report)
- Color: Blue
- Phenomenon: Six-ray asterism, confirmed by GIA — visible under direct single-source light only
- Transparency: Translucent (per GIA report)
- Certification: GIA (Gemological Institute of America), Sapphire Origin Report #2233980218
- Hardness: 9 on the Mohs scale
One of a Kind
This is a natural, untreated gemstone — no two star sapphires display exactly the same star, body color, and dome geometry, and once this stone is sold it cannot be reordered or reproduced.
Care of Blue Ceylon Star Sapphire
- Clean with lukewarm water and mild soap using a soft brush
- Remove before heavy physical activity, sports, or manual work
- Avoid ultrasonic or steam cleaners
- Store separately from other jewelry to protect the domed surface from scratching
This 8.09 ct Blue Ceylon Star Sapphire has been hand-selected for the sharpness and centering of its six-ray star and the evenness of its blue body — the two qualities that define a premium star sapphire at any size.
Why Customers Love This Gemstone
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GIA-Confirmed Unheated: Independent documentation of treatment status and origin (Report #2233980218).
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8+ Carat Scale: Large enough that the star reads clearly at any wearing distance.
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Classic Blue Color: The traditional, most recognized star sapphire color.
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Trusted Source: Ceylon origin, untreated, every attribute disclosed honestly.
Owning this 8.09 ct unheated Ceylon blue star sapphire means investing in a phenomenon gemstone at the scale and specification where collecting and fine jewelry converge.
Perfect Uses for this 8.09 ct Blue Star Sapphire
- Statement pendant — star visible in motion
- Large collector or display piece
- Gentleman's ring center stone at statement scale
- Investment in premium Ceylon star sapphire with GIA documentation
- Astrological or spiritual jewelry at meaningful weight
Free US shipping; Try-On available.
Item #: CG8440 | GIA Report #: 2233980218
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