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Diamond Guide

Diamond Education Chart

Diamond Guide to Rough Diamond sorting and evaluation where students are taught to sort and evaluate rough diamonds, and price rough diamond, Sorting & valuation. In nature there are no perfect crystals, or two identical diamonds, so their grading involves sorting them by more than 8,000 shapes and classification. http://24hourdiamondnews.com 

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Diamond Course Rough Diamond Grading Program


Diamond Course : Rough Diamond Grading and Evaluation Program

Diamond Course : Objectives

The Diamond course will prepare the student to become proficient in every technique involved in the manufacture and grading of diamonds

To teach the student how to sort and evaluate diamonds both in the rough and polished state and how color, imperfection, shape and proportions affect prices

Course Outline (Duration: 2 weeks)
  • How to use a loupe correctly
  • Gem and near gem
  • Different quality shapes colour sizing and sieving
  • Great precision of what is SAWABLE, MAKEABLES, MACCLES, CLIVAGE, REJECTIONS, FLATS and BOART with its qualities and colours
  • Cullinan ? De Beers mine ? surface ? underground tour
  • Visits to various alluvial diggings
  • How to use the Rapaport Diamond Price List. And the international Rapaport diamond price structure
  • How to look for and identify the grain in a sawed (four point) diamond
  • How to look for and identify the crystal symmetry, axis, plane, form and habit of diamond crystals
  • Moissanite identification
  • The study of impurity centres in rough diamond crystals, their cause and effect
  • How to select diamonds for fancy shapes, determining their ultimate form when in the rough
  • How to determine colour in diamonds, both natural and artificial, and its effect on buying and selling
  • How to select rough diamonds for purity, colour, size, shape and unusual qualities
  • How to determine whether a whole rough diamond is to be cleaved, sawed or remain whole
  • The process used in cutting and shaping elliptical diamonds such as , ovals,marquises pear shaped diamonds, etc
  • Classification of rough gems and industrial diamonds
  • How to use the Rapaport Diamond Price List and the international diamond price structure
  • Moissanite identification
  • Reading your GIA reports (Gemological Institute of America)
  • How to determine table, crown angle, pavilion and depth
  • Diamond grading systehysical and optical properties: how to clarity grade, and how to plot clarity characteristics
Course Costs
  • South African citizen: R8500
  • Non-South African citizen: US$1000
  • A 50% registration deposit fee is payable


Commencement The Rough Diamond Evaluation and Grading Courses will be run as follows:
  • Suite 505 SA Jewellery Center, Jewel City  Johannesburg:


03 May 2016 – 13 May 2016

16 May 2016 – 27 May 2016

30 May 2016 –10 June 2016


  • There will be a exam on completion of the course, and the student will receive a Internationally recognized Certificate stating that they have successfully completed the Rough Diamond Evaluation and Grading Course at The Corlia Roberts Diamond Education College.


  • The Rough diamond and Evaluation course is available to (1) Foreign passport holders OR (2) South African Citizens (3)Or holders of a Diamond Beneficiation or Diamond Dealers Licence from the The South African Diamond & Precious Metals Regulator (SADPMR)
  • Each course is limited to a maximum of 4 (Four) students. Corlia can be contacted on 2782 965-7740


  • There will be a exam on completion of the course, and the student will receive a Certificate stating that they have successfully completed the Rough Diamond Evaluation and Grading Course at The Corlia Roberts Diamond Education College.

Diamond Courses by The Corlia Roberts courses are presented in the heart of the diamond industry in South Africa in Jewel City, all the major Jeweler entities are housed at Jewel City.

  • The South African Diamond and Precious metals regulator
  • State Diamond Trader
  • Diamond Council of South Africa
  • De Beers DTC Sight Holders
  • Jewelry  manufacturers
  • Diamond Dealers
  • GIA and EGL  grading laboratories

Diamond Course Subjects covered in the classes include

  • buying advice
  • color and clarity chart price
  • buying loose diamonds
  • diamond character
  • diamond buying guide
  • sell diamonds
  • buying online
  • Color Clarity chart
  • Rapaport
diamond course
ALROSA recovered a large diamond of 121.96 carats from Jubilee kimberlite pipe. The diamond was extracted by the company’s business unit Aikhal Mining and Processing Division (MPD) at the processing plant No.14. The diamond has an octahedral shape, it’s dimensions are 31.28 х 30.00 х 28.57 mm. The crystal of “2 Black Sawables 3 colour” quality is transparent with moderate yellowish hue. There are small olivine, graphite and sulphide inclusions in this crystal. Jubilee pipe is famous for its large finds. A few diamonds from 50 to 138 carats were recovered from the deposit year to date. The fact of extraction of one of them, a 76.07-carat diamond, was named in honor of 70 Years of Victory in the Great Patriotic War – the substantial part of World War II. Another Jubilee diamond, a 64.23-carat octahedral stone, in December was named in honor of the 40th anniversary of independence of the Republic of Angola.

Rough Diamond Course  @diamondcourses