Fossils, native metals (Silver, Copper, Gold...) and meteorites are highly sought after by collectors and enthusiasts.
Their vibrant colours, intricate patterns and unique shapes make them objects of fascination.
For centuries, meteorites, native metals, and fossils have been revered as sacred objects by various cultures and civilizations. Ammonites, nautiluses, turritellas, sea urchins⊠each fossil, each meteorite tells an ancient story.
Whether you are looking for a paleontology enthusiast, a mineralogy aficionado, or a curious amateur, delve into the history of our planet by acquiring quality pieces.
â How is a fossil formed?
Fossilization occurs through permineralization: the pores of the bone, for example, are filled with minerals (silica, calcite, pyriteâŠ) or through total replacement: organic matter is entirely replaced by minerals.
- The minerals involved are often:
- Calcite (CaCOâ): common in marine or lacustrine environments.
- Silica (SiOâ): produces very hard fossils.
- Calcium phosphate: in fossils of bones or teeth (like apatite).
- Sometimes pyrite (FeSâ) in anoxic environments.
â What are native metals?
Native metals are minerals consisting of a single metallic element present in its pure form in nature, without being chemically combined with other elements.
Unlike the majority of metals that are extracted from ores (oxides, sulfides, carbonatesâŠ), native metals are found directly in natural metallic form.
The best known include gold, silver, copper, but also, more rarely, platinum or mercury.
They form under specific geological conditions, often linked to hydrothermal or magmatic processes.
Their crystalline structure and physical properties (high density, metallic luster, conductivity) make them easily recognizable.
Historically, native metals have played a major role in the development of civilizations, as their natural accessibility allowed for their early use in the manufacture of tools, coins, and jewelry.
â What is a meteorite?
A meteorite is a fragment of rock or metal from space that has passed through Earth's atmosphere before reaching the ground.
It usually comes from asteroids located between Mars and Jupiter, more rarely from the Moon or Mars.
Upon entering the atmosphere, intense friction causes significant heating, forming a dark fusion crust on the surface.
Three main categories are distinguished: stony meteorites (chondrites and achondrites), metallic meteorites rich in iron and nickel, and mixed meteorites called sideroliths.
As direct witnesses to the formation of the solar system more than 4.5 billion years ago, they are invaluable for scientific research.
Highly sought after in collections, meteorites fascinate because of their cosmic origin and their unique character, true fragments of the universe that have fallen to Earth.
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