oxides

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emerald cut magnetite from Congo

magnetite

ck_admin March 24, 2021

Known since antiquity, Pliny the Elder mentioned it in the year 77, it was identified in 1845 by von Haidinger. It is named after the Greek “magnes”, which means magnet, it is found on Mount Magnetos in Greece. It is a naturally magnetic iron oxide

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Ilmenite emerald cut

ilmenite

ck_admin March 24, 2021

It is named after the Ilmen Mountains in Russia, where it was discovered in 1827.

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hibonite crystal from Madagascar

hibonite

ck_admin March 24, 2021

Identified in Madagascar in 1956, its name honors the French geologist Paul Hibon who discovered it.

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faceted hematite

hematite

ck_admin March 24, 2021

It is also called blood or blood stone and his name probably comes from the fact that it turns blood red the cooling water when it is cut (from the Greek “haimatos” for blood). Note however a false-English friend: “bloodstone”, this English name is referred

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goethite and lepidocrocite inclusions in quartz from Brazil cushion cut

goethite

ck_admin March 24, 2021

It is known and used since prehistory, prehistoric people used it as a pigment for paint in the caves, such as at Lascaux. It was identified in 1806 by the mineralogist Johann Georg Lenz (1748-1832) and its name honors the German writer Goethe. This is

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diaspore from Turkey

diaspore

ck_admin March 24, 2021

Discovered in 1801 in the Urals in Russia, its name comes from the Greek word “diaspora”, meaning “disperse” because when heated with a blowtorch it explodes and disperses into small particles. It is a component of earthy bauxite, but is found in gem quality in

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