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Stones of CeylonRough & Cut
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Cut stone

3.42ct Untreated Ceylon Blue Sapphire

3.42 ct · Sapphire

A properly untreated Ceylon cushion, medium tone and strongly saturated.

$18,900

$5,526.32 per carat · AUD, GST included where applicable

Demonstration record

This example is here to show the disclosure format. It is not real inventory, does not enter product feeds and cannot be reserved or purchased.

  • One of a kind — when it sells it is gone, and the listing stays up as a record.
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About this stone

Untreated blue sapphire from Elahera, certified by GRS with origin and no indications of heating. The colour is a medium tone with strong saturation and no zoning visible face-up — the window that opens under a torch closes completely in normal light, which is as much as one can ask of a stone cut to keep weight.

The cut is a native mixed cut with a brilliant crown over a step pavilion, re-polished by us on the table and a small area of the girdle. Extinction is minimal for the shape. Eye clean; under 10× there are fine silk needles consistent with an untreated Sri Lankan origin, and they are part of why the report reads the way it does.

Specification

Specification for 3.42ct Untreated Ceylon Blue Sapphire
FormCut stone
SpeciesSapphire
Weight3.42 ct
ShapeCushion
Measurements9.6 × 8.1 × 5.4 mm
ColourMedium tone, strong saturation, even across the face with no zoning visible face-up
Colour familyBlue
ClarityEye clean
CutMixed cut, brilliant crown over a step pavilion. Native re-polish, well closed.
OriginElahera, Sri Lankastated on the GRS report

Calibrate the size

ANY BANK CARD
The stone’s 9.6 × 8.1mm outline, drawn to the same scale as a bank card. Hold one against the screen and the stone beside it is life size — if the card does not match, zoom until it does. The outline is the idealised shape rather than this stone’s own profile; the photographs are the stone.

Treatment & certification

No indications of heating

No heat and no other treatment of any kind.

How we know

No indications of heating (GRS report GRS2026-041188).

GRS reportGRS2026-041188

Natural sapphire, Sri Lanka, no indications of heating.

Issued 11 March 2026. The report travels with the stone.

Every listing on this site states its treatment, including when the honest answer is that we don’t know. How we describe stones.

Evidence provenance

This is an educational record. Its values demonstrate the format and do not represent an owned stone or publication-approved evidence file. It cannot be purchased or exported as a product.

Shipping, inspection and care

No carrier promise is inferred from this page. At checkout the live service must find a recently verified route that accepts loose gemstones, the destination and the full declared value.

You have seven days from delivery to request a change-of-mind return, in addition to rights under Australian Consumer Law. Read the inspection and return process.

Keep the stone loose, dry and separated from harder material. Do not use heat, chemicals, ultrasonic cleaning or steam without advice specific to the species, treatment and condition. Rough and specimens should not be altered during the inspection period.

Permanent disclosure history

Demonstration data has no commercial disclosure version.

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