The five S’s and the points of the Star!

  1. Source
  2. Size
  3. Shape
  4. Strength
  5. Surface

SMS Quality Process 

  • Raw material undergoes several ‘regular’ tests.
  • In addition to these tests, SMS tests the purity of the diamond prior to processing to Micron specification.
  • Where diamond is found to have signs of static, static mitigation processing takes place.
  • Finally, the diamond is packed and sent for crushing.


process_main1 process_main2

  • Characteristics of crystal individually graded, allowing for accurate matching of samples.

Methods of observing size distribution

  • Area equivalent circle diameter is to place a circle over the particle and measure the diameter.
  • Feret Diameter is to place a rectangle over the particle and measure the shortest distance.