Laboratories

GIA, GRS, SSEF and Gübelin do not write in the same voice. GIA’s diamond system is the one trade most often quotes, which is why the four Cs, fluorescence and proportions share a language. In coloured stones the wording of origin and heat differs. Some laboratories will name an origin. Some prefer silence when the evidence is thin. Silence is discipline, not weakness.

Kashmir sapphire shows the power of a sentence. Very few stones are written as Kashmir, and very few laboratories will write it. A cornflower stone can be excellent and still have no right to the place-name. Yushanxue speaks of hue. If a client’s report names an origin, we read that line. We do not add a second line of our own.

GRS is often quoted on ruby colour, so words like pigeon blood travel faster. Hearing is not agreement. Colour, treatment and proportion remain. SSEF and Gübelin carry weight in origin research, and their refusals deserve respect. A report without an origin can still be a strict report.

The salon issues none of these reports and imitates none of their seals. We help prepare a submission. The laboratory depends on the object and the client. If insurance asks for a report, the report must be the laboratory’s, not the maison’s adjective. That is a boundary, and it is manners.

The four laboratories share a page so they will not be ranked. Rankings expire. Differences of wording do not. If a client holds two reports that disagree, the salon reads the difference aloud. It does not choose the prettier sentence as the maison’s attitude. Prettier is not truer.

No indications of heating means that laboratory, with its methods, did not see evidence. It is not a theology of never. The market often turns the sentence into a premium. The premium can be real. It is not a synonym of beauty. Yushanxue and Dielan repeat the sentence. They do not intensify it.

Heated, or an equivalent H, admits that heat took part. Traditional heat is widely accepted and usually priced below a comparable no-indications stone. How far below depends on colour, clarity and whether an origin line is also present. We do not print a percentage. Percentages expire. The sentence does not.

SSEF and Gübelin carry weight partly because they often refuse. A refusal looks like a missing line and is an expensive blank. GRS colour terms travel fast. Fast is not adoption. We return to the stone.

A GIA diamond report gives trade a shared language, which is why Xinghe can write crown and pavilion as a path that can be checked. Coloured stones do not share one sentence. If two reports disagree, the salon reads the disagreement. It does not add an origin of its own.

Minor oil, significant resin, filler and residue are not one grade. Polymer in jadeite is Yunxiu’s line of refusal. Irradiation, HPHT, dye and coating are different verbs. One word, natural, is the wrapping this page takes apart.

A price gap, if it must be understood, is a distribution of risk, not a guarantee of beauty. Insurers and auctions want the original sentences, not the maison’s paraphrase. A paraphrase hotter than the original is a documentary failure.

A reservation on an origin is the part most often dropped in retelling. We quote the line only while the reservation remains.

Heat with residue is not the same sentence as heat alone. Residue is not rinsed away by a colour adjective.

Fluorescence is not heat. None and Faint are Xinghe’s default. Medium and above are looked at in daylight before they are kept. The two vocabularies do not translate.

A report has a date. An old sentence is not automatically today’s sentence. A quotation without a date is not evidence. Evidence is the paper, and the stone beside it that can still be turned.