1.81 ct Natural Unheated Yellow Sapphire – Radiant Cut | GIA Certified | Sri Lanka (Ceylon)

A 1.81 carat yellow sapphire from Sri Lanka, unheated, accompanied by GIA Sapphire Origin Report #1242017778. The report prints the species as Natural Corundum and the variety as Natural Sapphire, the color as Yellow, the shape as Octagonal and the cutting style as Modified Brilliant Cut — the combination the trade calls a radiant. Under Additional Results it records No Indications of Heating, and it carries the printed comment "This stone passed GIA's color stability test."

About This Stone

What the GIA report records, and what on this page is our own description:

• Color: The report prints the color as Yellow — plain, with no qualifier. GIA issues no color grade on a colored-stone report, and we quote none.
• Size: 1.81 carats, measuring 7.53 × 4.92 × 4.90 mm. That is a length-to-width ratio of about 1.53 to 1 — our own arithmetic from the measurements the report prints.
• Shape and cut: The report prints Shape: Octagonal and Cutting Style: Modified Brilliant Cut — a rectangular, cut-corner outline finished throughout with brilliant faceting. The trade calls that combination a radiant; the trade name is ours, not the report's.
• Treatment: Under Additional Results the report records No Indications of Heating. That is a finding about heat alone, and we describe the stone as unheated on that basis; we make no statement about any other treatment class.
• Color stability: The report carries the printed comment "This stone passed GIA's color stability test." We quote the comment and claim nothing beyond it: like No Indications of Heating, it records what GIA observed under its own method.
• Origin: The report's Geographic Origin field prints Sri Lanka, and GIA prints its own caveat with it: "Any statement on geographic origin is an expert opinion based on a collection of observations and analytical data." A place of origin is not a measure of quality; we use Ceylon as a name for the source, never as a grade.
• Clarity: Very Very Slightly Included — our own assessment, not a GIA grade. GIA colored-stone reports carry no clarity grade.
• Documentation: GIA Sapphire Origin Report #1242017778, dated August 03, 2026. The report number can be checked at reportcheck.gia.edu.

Buying Guidance

A few practical points to weigh before purchasing this specific stone:

• View it in both daylight and warm indoor lighting. Yellow sapphires can read slightly differently between light sources, so it is worth seeing the stone under the light you expect to wear it in.
• Plan the setting around its 7.53 × 4.92 × 4.90 mm octagonal outline. The cornered rectangular shape benefits from prongs or a setting style that protects the corners.
• If you are comparing other yellow sapphires, ask for the treatment disclosure on the lab report. This stone's GIA report records No Indications of Heating in writing.
• Factor the documentation into the comparison. This report states the origin determination, the heat finding and the color-stability comment in one document, and the report number can be checked at reportcheck.gia.edu.
• If you are sourcing an unheated stone for Jyotish (Vedic astrology) use, the heat finding you are looking for is printed on the document: No Indications of Heating.
• Use the Try Before You Buy option if you would like to see the stone in hand before finalizing the purchase.

Features

• SKU: CG8419
• Carat Weight: 1.81 carats
• Dimensions: 7.53 × 4.92 × 4.90 mm
• Species: Natural Corundum (as printed on GIA Report #1242017778)
• Variety: Natural Sapphire (as printed on GIA Report #1242017778)
• Shape: Octagonal (as printed on GIA Report #1242017778)
• Cutting Style: Modified Brilliant Cut (as printed on GIA Report #1242017778)
• Trade name for that shape and cutting style: radiant — our term, not the report's
• Color: Yellow (as printed on GIA Report #1242017778)
• Transparency: Transparent (as printed on GIA Report #1242017778)
• Geographic Origin: Sri Lanka (as printed on GIA Report #1242017778)
• Additional Results: No Indications of Heating (as printed on GIA Report #1242017778) — the stone is unheated
• Printed comment: "This stone passed GIA's color stability test."
• Clarity: Very Very Slightly Included — our own assessment, not a GIA grade
• Hardness: 9 on the Mohs scale — listed on the report for corundum as a species
• Certification: GIA Sapphire Origin Report #1242017778

Care of Ceylon yellow sapphire gemstone

• Clean with lukewarm water and mild soap using a soft brush
• Store separately to avoid surface contact
• Remove before heavy physical activity
• Avoid ultrasonic or steam cleaners

What's included

• GIA Sapphire Origin Report #1242017778
• Gemstone packed in a gem sleeve