The process to map the crystalline structure of a diamond, a process and apparatus for producing the record of a diamond, the record of a diamond and process for identifying a diamond.

摘要

PCT No. PCT/GB88/00188 Sec. 371 Date Nov. 15, 1988 Sec. 102(e) Date Nov. 15, 1988 PCT Filed Mar. 10, 1988 PCT Pub. No. WO88/07189 PCT Pub. Date Sep. 22, 1988.A method for mapping the crystal structure of a diamond comprises placing the diamond in a beam of monochromatic laser radiation, filtering the resultant scattered Raman radiation, and measuring the intensity of the filtered radiation at one or more different orientations of the diamond which may be compared with records of known diamonds to identify the diamond.