Category Touch
Subcategory - Stamps with Rock Dust
Subcategory - Stamps with Rock Dust
Spain 2020 Mineral - Jet
Issue date 29 May 2020
The famous Asturian jet is an organic gemstone, highly valued for its excellent cutting qualities, and attaining a typical shine and intense black colour after polishing. Specialist studies determine that the woody material , which becomes a humic carbon, peri hydrogenated during the Kimmeridgian age (Late Jurassic) around 155 million years ago, underwent particular circumstances while it formed, such as impregnation with hydrocarbons, which gives it some of its unique features and exceptional stability for use in jewellery making.
The image shows one of the old abandoned mine entrances in the Oles area. This is the only one that can be visited and is the end of what is known as the “Jet Route” (PR-AS.199).
A small sample of the prestigious Oles jet is impregnated exclusively in this Premium Sheet.
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