With a coloured diamond, the colour sets the price, and the colour is on the lab report, not in the viewer's eye after ten years. The stone itself is small enough for any pocket. In the overview Security for collectors this is a case for the safe plus a folder that lies somewhere else.

How it leaves

It takes the same path as jewellery: a known drawer, a short stay, no interest in the furniture. A coloured stone without a report is harder to sell on the grey market at the price you paid. That does not protect you from the loss. It only explains why the folder is worth more to you than to the thief.

What time does to it

Strong light and heat are the slow damage for colour. You store it in the dark and at a stable temperature. A display case in a south window is the wrong stage. In the safe the stone sits in a material that does not outgas.

Where it goes

An anchored certified safe, an item list with the lab number, insurance on its own, once the stone breaks the flat limit. You do not name the class of the safe from your gut. You name the sum, the insurer names the grade.

The papers

The original report stays in the document cabinet. A copy is enough for the watchmaker or the setter. The original does not go along to the workshop as long as a copy will do. A photo of stone and report in one image, filed, not posted.