Gems
Loose or set stones: the four Cs, origin, treatment, phenomena, and the laboratory report that proves them.
A gem's record mirrors its laboratory report — carat, shape and cut, colour, clarity, transparency, phenomena such as asterism or colour change, saturation and tone, inclusions, origin, and whether it is natural or lab-grown. Treatment is recorded explicitly because it changes value more than anything else. Setting status says whether the stone is loose or mounted; a mounted stone can also be recorded on its jewelry.
What the record holds
| Field |
|---|
| Gem type |
| Carat weight |
| Shape |
| Cut |
| Color |
| Clarity |
| Transparency |
| Phenomena |
| Saturation and tone |
| Inclusion notes |
| Dimensions |
| Origin |
| Natural / lab-grown |
| Treatment |
| Certification body |
| Certification number |
| Setting status |
Documents a specialist expects
- Laboratory certificate (GIA, SSEF, Gübelin, AGL…)
- Appraisal
- Receipt / invoice
- Insurance policy
The asset page shows which of these are missing; the Estate readiness score counts them. See Documents.
How it is valued
Appraisal against the certificate; auction results for named stones; the engine for an indicative range by type, weight and grade. Every figure is kept in the asset's valuation history with its source and date — see Valuation.