Ranieri Gems
Field Notes
The maison’s notes on a single stone and on the trade. We write about what we know and what usually goes unsaid: how to read a report, how origin is proven, why a green is not an emerald.
In this issue
The craftTreatments, told straight
Almost every stone on the market has seen a furnace or an oil. The problem is not the treatment: it is the silence. An honest guide to what changes, and by how much.
6 min
GemmologyHow a stone’s origin is established
How a laboratory says “Kenya” by looking inside a gem. Trace elements, landscapes of inclusions, and why coloured stones have no Kimberley Process.
7 min
Stone storiesTsavorite, the green that is not emerald
Discovered in 1967, named by Tiffany, brighter than emerald and often purer. But it is not emerald, and we do not sell it as one.
6 min
What we write about
Provenance
Where the stones come from, and how we actually know.
Gemmology
How a gem works, and how you learn to read one.
The craft
Reports, treatments, prices. The bench, told in full.
Stone stories
The biography of a single gem: discovery, name, journey.
The longest entry in Field Notes is a dossier of its own: the geology of the Rift, the six Kenyan species, and what we can honestly claim about a provenance.
Open the Rift Valley dossier