1967 General Electric Company to produce a kind of similarity with the diamond crystal refractive index and the similar density, while Kathleen Lonsdale for the first time in Arizona Barringer meteorite crater found related to Kena tiny hexagonal diamond and later in New Mexico and Alan Hill (ALH company) 77283 meteorite, Victoria Land, Antarctic meteorites, the Russian Tunguska meteorite and other places are also found in this particular diamond. To commemorate the British women scientists Crystallographer in X-ray diffraction crystallography contribution, this diamond was named Lonsdale, also known as "hexagonal diamond", which is transparent to brown or dark brown, the refractive index from 2.40 to 2.41, increased from 3.2 to 3.3 Mohs hardness of 7-8. In the U.S., have found that the average size of diamonds, only 12 microns (0.12 mm), needs the microscope can observe the clear, 1987, under the microscope of small fragments of diamond, called "nano-diamond", a diamond As the old galaxies, the universe is now a new instructions collision minerals. New research shows that they formed in the radiation flashes more than 500 million years ago have died in the rich red giants Zhoubian methane in the gas cloud, this process is, in essence, and the so-called "chemical vapor deposition growth of diamond synthesis - chemical vapor deposition "The new technology the same.
It is said that in the United States National Museum of Natural History in Washington, there is a diameter of about 1 mm in size, "Lonsdale Stone", as if 25 million U.S. dollars price tag.
Yunnan is a very large meteorites meteorite phenomenon also found in Yunnan meteorite some millimeter hexagonal diamond, made out with a few pictures enjoy .
