IshaRa Gems & Jewels

Journal folio 02

Reading a Gemstone Disclosure

Disclosure

7 minute read

Natural yellow sapphire crystal or mineral specimen in close catalogue view.
0103
Natural yellow sapphire crystal or mineral specimen in close catalogue view.

A useful disclosure separates identity, origin, treatment and opinion. Each answers a different question about a stone.

01 · Identity comes first

A name should identify the material precisely enough to avoid confusion. Ruby means red corundum. Emerald means green beryl of the accepted colour range. An unqualified cat's eye means chrysoberyl, while other chatoyant stones need their species attached to the name.

The record should also distinguish natural from laboratory-grown material and identify assembled or composite construction where present. These are descriptions, not judgements about taste.

Natural origin, geographic origin and treatment status are three separate statements.

02 · Treatment language must be specific

Heat, diffusion, irradiation, fracture filling, oiling, dyeing and coating do different things. A broad word such as enhanced can conceal information that matters to care, repair and future assessment.

Some treatments are common and stable in ordinary wear. Others need special care or can materially change how a stone should be described. The useful question is not whether treatment sounds acceptable in the abstract, but exactly what was detected in this stone.

03 · Origin is an expert opinion

Geographic origin is not visible from colour alone. When it can be determined, a qualified laboratory reaches an opinion by comparing inclusion scenes, trace chemistry and spectroscopy with reference data.

A famous source does not establish the quality of an individual gem. Look at the stone, read the report and keep the origin opinion in proportion to the complete material record.

04 · Ask what the report does not say

A report identifies the submitted stone within the scope of its service. It may not provide a value judgement, full ownership history or a guarantee that a mounted piece has not changed since testing.

At IshaRa, the stone disclosure is paired with a setting and care note so laboratory language can inform the life of the finished object.

AE.TH.RY.ON.EX.IS