What does kyanite mean?
Kyanite is a mineral composed of aluminium silicate, best known for the blue, green, and sometimes white or black colours of its crystals. It forms in metamorphic rocks, especially those that have undergone regional metamorphism, and is often associated with quartz, mica, and garnet. The mineral is distinctive because its hardness varies according to the direction in which its surface is tested. Clear blue specimens may be cut as gemstones, while other material is of interest to collectors and to geologists studying metamorphic processes. The name kyanite comes from the Greek word for blue. In specialist writing, the mineral is generally referred to in the singular as a type of material, although 'kyanites' can be used for separate specimens. The alternative name 'cyanite' remains in use, particularly in older sources.
nounA blue or green mineral composed of aluminium silicate, occurring commonly as crystals in metamorphic rocks. Kyanite is notable for its varying hardness in different directions and is sometimes used as a gemstone or ornamental material.
- A blue to green aluminium silicate mineral that forms triclinic crystals and occurs in metamorphic rocks.
"The specimen contains vivid blue kyanite crystals embedded in a pale matrix."
"Collectors value transparent blue kyanite for its unusual colour and crystal form."
"The metamorphic rock contains bands of kyanite alongside quartz and garnet."
Used for multiple specimens or crystals of the mineral; otherwise kyanite is generally a mass noun.
"The display included kyanites from several different geological localities."
Kyanite takes its name from the Greek word for blue, a fitting tribute to one of its most recognizable colours.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Where does kyanite come from?
The name kyanite derives from the Greek kyanos, meaning 'blue', through a New Latin form associated with the mineral. It was named for its characteristic blue crystals. The same Greek root also lies behind English words such as cyan, cyanate, and cyanide, which reflect the colour or historical chemical connections of blue substances.
How kyanite is actually used
In scientific and geological writing, the mineral is normally treated as a mass noun, although the plural 'kyanites' may be used when referring to multiple specimens or crystals. The alternative spelling 'cyanite' is also encountered, but 'kyanite' is the preferred form in modern mineralogy.
Easily confused with kyanite
Cyanite is an alternative name for kyanite; both terms refer to the same aluminium silicate mineral.