Population bottlenecks are when population size reduces for a short period of time. Overpopulation may indicate any case in which the population of any species of animal may exceed the carrying capacity of its ecological niche.
The name zirconium comes from the mineral zircon, which is the most important source of the metal. The largest deposits of this mineral are found in Australia, Brazil, Russia, India, South Africa and the United States. Australia and South Africa are the largest miners of the mineral.
By Anne Marie Helmenstine, Ph.D. Cubic zirconia or CZ is the crystalline manmade form of zirconium dioxide, ZnO 2. Zirconium dioxide is also known as zirconia.Ordinarily, zirconia would form monoclinic crystals. A stabilizer (yttrium oxide or calcium oxide) is added to cause zirconia to form cubic crystals, hence the name cubic zirconia.y Anne Marie Helmenstine, Ph.D. Cubic zirconia or CZ is the crystalline manmade form of zirconium dioxide, ZnO 2. Zirconium dioxide is also known as zirconia.