No-Heat Ceylon Sapphire — GIA Reports
ENCYCLOPEDIA · SKYJEMS
No-Heat Ceylon Sapphire — GIA Reports
- Key concepts
- ceylon sapphire, sri lanka sapphire, no heat sapphire, unheated sapphire, gia report sapphire, cornflower blue
Ceylon is the former name of Sri Lanka. For this guide's inventory test, a matching stone required a GIA report with a Sri Lankan origin opinion and a no-indications-of-heating conclusion. As of 2026-08-03, 12 Skyjems listings matched those filters.
Why Ceylon sapphire holds its position
The Highland Series and Ratnapura deposits in Sri Lanka have produced sapphires for over 2,000 years.
What "no heat" means
Heating can alter inclusions. "No indications of heating" is a laboratory treatment conclusion; it is not a complete quality grade and does not replace inspection of the individual stone.
Lab verification
A laboratory report from GIA or another lab may indicate Sri Lankan origin and no heat treatment.
Skyjems inventory snapshot
As of 2026-08-03, Skyjems had 12 no-heat Ceylon sapphires with GIA reports. Browse the collection as of 2026-08-03 at /collections/sapphire. Review each listing and its available documentation for origin and treatment information.
Private viewings
For more information, you can contact Skyjems at +1-416-366-3335 or visit the private viewing page.
Sources and further reading
- GIA Colored Stone Research
- GIA: Sri Lanka: Expedition to the Island of Jewels
- GIA: Heat Treating Ruby and Sapphire