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zircon
(redirected from Zircons)

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zircon

Zirconium silicate, ZrSiO4, a mineral that occurs in small quantities in a wide range of igneous, sedimentary, and metamorphic rocks. It is very durable and is resistant to erosion and weathering. It is usually coloured brown, but can be other colours, and when transparent may be used as a gemstone.

Zircons contain abundant radioactive isotopes of uranium and so are useful for uranium–lead dating to determine the ages of rocks.



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? Mentioned in ? References in periodicals archive
 
Lunar zircons were not studied at the time of the Apollo missions because the technology to date them did not exist," said geologist Clive Neal of the University of
Oldest zircon from lunar rock suggests molten moon solidified 90 ... by Asian News International
New clues about the planet's early history have emerged from zircons in rocks from Western Australia's Jack Hills, scientists report in the Nov.
Plate tectonics may have had an early start: ancient zircon crystals ... by Perkins, Sid / Science News
CBA agreed to extend the repayment date of Adelaide-based Australian Zircons $5 million temporary overdraft facility to June 30, from December 30.
Australia: Zircon gains debt repayment extensions by TendersInfo
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