The most widely known form of radiometric dating is carbon-14 dating.
This is what archaeologists use to determine the age of human-made artifacts. The half-life of carbon-14 is only 5,730 years, so carbon-14 dating is only effective on samples that are less than 50,000 years old.
Zircon-rich sediments are mined and the recovered zircon is used to produce zirconium metal and zirconium dioxide.
These are used in a wide variety of manufactured products and industrial processes.
The four-sided crystals are prismatic with a square cross-section and terminate with a pyramid. Zircon is a popular gemstone that has been used for nearly 2000 years.However, most gem-quality stones are heat treated until colorless, gold or blue (the most popular color).Blue zircon, in particular, is the alternative birthstone for December.Color differences in zircon are caused by impurities, some of which (like uranium) can be slightly radioactive.These gems are also treated with heat to stabilize the radioactivity.