A place to store pearls without friction
A practical guide based on GIA recommendations to protect your pearls from wear, chemicals, and environmental changes, without relying on rigid maintenance intervals.
Jewellery, gemstones and watches
Discover jewellery materials, gemstone properties and watch features. Guides and documented references to understand the details.
Water resistance: start with the watch manual
The marking alone does not tell the whole story. Identify the exact reference, consult its documentation, and consider the watch's condition before deciding how to use it.
Your watch and everyday objects: a question about magnetism
A practical guide to understanding how magnetism interacts with watch mechanisms, based on Seiko information, without remote diagnostics.
A hard gem also needs care
Hardness is not synonymous with indestructibility. This guide explains, based on GIA information, the difference between scratch resistance and toughness, and offers practical criteria for caring for gems such as corundum.
What information to ask before cleaning a piece of jewelry
Before choosing a cleaning method, gather data on the materials and treatments of the piece. This guide distinguishes what a gemological report can provide and what questions are worth asking.