Scientists and philosopher team up, propose a new way to categorize minerals

Op de website van staat een artikel ven het Carnegie Institution for Science. Het gaat over de indeling van mineralen. Eeen leuke discussie die wij jullie niet willen onthouden. Veel lezieb met het lezen.

A diamond lasts forever, but that doesn’t mean all diamonds have a common history.Some diamonds were formed billions of years ago in space as the carbon-rich atmospheres of dying stars expanded and cooled. In our own planet’s lifetime, high-temperatures and pressures in the mantle produced the diamonds that are familiar to us as gems. 5,000 years ago, a large meteorite that struck a carbon-rich sediment on Earth produced an impact diamond.

Each of these diamonds differs from the others in both composition and genesis, but all are categorized as “diamond” by the authoritative guide to minerals—the International Mineralogical Association’s Commission on New Minerals, Nomenclature and Classification.

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Bij de foto: Currently 32 different mineral species of the “tourmaline group” are delineated by the distribution of the major elements of which they are comprised. So, a single shard of tourmaline with slight variations in chemistry often contains multiple species of the mineral, even if they all formed in the same geologic event. Credit: Public domain

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