Unheated Colour-Change Sapphire Ring
Unheated Colour-Change Sapphire 39.71 CT
Sri Lankan origin, 39.71 carats
Unheated, with a natural colour-change effect
The Story
39.71 carats, no heat treatment and a change of colour under different light sources distinguish this Sri Lankan sapphire. In addition to its report, GIA provided a special letter discussing the uncommon combination of substantial weight, unheated status and distinct colour change.
Colour change
One sapphire
Two colours
Under daylight-equivalent illumination, it appears bluish violet; under warm light such as an incandescent lamp, it shifts to purple. This is a natural response to different light sources. The 39.71-carat centre stone offers ample room to appreciate the effect.
Ring craftsmanship
Surrounded by diamonds
A sculptural silhouette
Diamonds follow the oval centre stone, tracing its outline. In profile, the setting and the details joining the stone to the metalwork become visible.
Worn
39.71 carats, shown worn
The substantial dimensions of this unheated sapphire reveal its natural colour and its response to different lighting. Photographs of the actual ring on the hand give a clear sense of its size and proportions.
GIA
GIA Report and Special Letter
The GIA report records a 39.71-carat sapphire of Sri Lankan origin, with no indications of heating. The accompanying letter discusses the rarity of fine unheated sapphires over 10 carats, and the distinctive combination of weight, unheated status and colour change in this stone.
THE PARTICULARS
Jewel Details
Unheated Colour-Change Sapphire Ring
- Centre stone
- Natural colour-change sapphire, 39.71 ct
- Origin
- Sri Lanka (GIA)
- Heat treatment
- No indications of heating
- Colour change
- Bluish violet to purple
- Shape
- Oval
- Centre stone measurements
- 22.02 × 17.79 × 11.52 mm
- Gemstone Reports
- GIA report · Accompanying letter