A laboratory report is the single most informative document attached to a fine sapphire. Read carelessly, it is a string of jargon. Read carefully, it is a precise statement about what the stone is, how it has been treated, and where the laboratory believes it came from.
This guide walks through the sections that matter most.
Species, variety, and the word “natural”
The first line of every reputable report identifies the species and variety. For sapphires, this will read Natural sapphire with a colour qualifier. The word natural is doing real work — it means the laboratory has examined the stone under magnification, spectroscopy and other gemmological methods and concluded it was formed in the earth, not synthesised.
Treatment status
Treatment is where careful wording matters. You may see:
- No indications of heating — the most common phrasing on top reports. It is an opinion, not a guarantee.
- Unheated — used when the laboratory is willing to make a stronger statement.
- Heat treatment — heat has been detected.
izel follows the wording of the issuing laboratory exactly. We do not paraphrase “no indications” as “guaranteed unheated”.
Origin
Origin is always an opinion. A laboratory cannot prove a stone came from a specific deposit; it can only say the stone is consistent with reference samples from that origin. Most reports that include origin will phrase it as Origin opinion or simply list the country.
What is not on the report
Reports do not include price. They do not include a beauty or quality grade. They do not endorse the seller. The dossier is yours to write — and ours.