| Duration | 3 1/2 Months |
| New Batch Commences | January, April, August, every year. (Tentative Dates) |
| Timings | 10.00 a.m. to 1.00 p.m. |
| Tuition Fee | – |
| Seminar Fee | – |
| Lab Deposit (Refundable) | – |
| Minimum Qualification | Matriculation or equivalent (Completion of Gemmology Course D. G; and/or F.G.A. (London); G.G. (USA); D.Gem. G. (Germany) is preferred). |
| Medium of Instruction | English |
| Attendance | 100% in practicals and 80% in theory is compulsory. |
| Examinations | Theory, Oral and Practical. |
| Percentage of Passing | Minimum 70% in theory/oral examination and 100% in practical examination. Home work assignments and weekly tests will also be taken into account. 90% and above in theory and 100% in practicals qualify for a distinction. |
| Re-examination | Unsuccessful students wishing to re-appear for the next examination will have to pay the examination fee of Rs. 1,000/-. |
| Certificate | On successful completion of the course a Diploma is awarded. |
CHEMICAL COMPOSITION : Different forms of carbon (graphite, amorphous, diamond)
GEOLOGICAL OCCURRENCES AND THEIR HISTORY : Gem and industrial diamond, kimberlite (mines); Alluvial deposits (river beds); Marine deposits (beaches, sea-bed); Meteoric diamonds; Localities like Australia; Borneo; Brazil; India; Sierra Leon, Russia; South Africa; South West Africa, Zaire, Canada etc.
EXTRACTION OF DIAMONDS : Crushing, Washing and Screening, Heavy media separator; Grease table, Grease belt, X-ray separation
OPERATION OF THE MARKET : De-Beers consolidated Mines; Diamond Trading Company (D.T.C.); Sights supplied by D.T.C.; Diamond Bourses; Clubs; Operation of the National and International markets. Sources of Rough diamonds : HDC, MMTC, NMDC, Local-resellers, DTC, Open market
OPTICAL PROPERTIES : Single; double and anamolous double refraction, Refractive index; Strain patterns; Dispersion; Absorption spectra; Transparency to Ultra-violet and x-rays; Reflectivity; Luminiscence
SORTING OF ROUGH DIAMONDS : Sorting by Size; Shapes; Colour; Purity
HISTORY OF CUTS : The modern brilliant cut; Variation of the brilliant cut; Principles of diamond cutting; Lustre, brilliance, fire, ideal cuts and proportions; variation from the ideal cut
MANUFACTURING OF DIAMONDS : Grains; Sawing; Cleaving; Bruting; Grinding; Polishing; 4,3,2, point stones; Acidising; Ultrasonic cleaning
COLOUR GRADING OF POLISHED STONES : Lighting standards and magnification; Comparison stones. Colour grading systems (G.I.A.; HRD; Indian; C.I.B.J.O.)
CLARITY GRADING OF POLISHED STCNES : Magnification; Lighting; International grading scales; (G.I.A.; HRD; Indian; C.I.B.J.O.); Criteria for grading; Internal blemishes; External defects
GRADING FOR CUT : Spread stones; Lumpy and Fish-eye stones, Proportion scope and proportion analysing, Carat system; Weighing scales; Estimating weight of mounted stones (gauges); Sieves and sieve sizes.Estimating : Table percentage, Pavilion depth, Crown angle, Pavilion angle and Girdle thickness
SYNTHETIC DIAMOND : Synthesis; Artificial colouration; Identification of treated diamond
IDENTIFICATION OF DIAMOND : With 10x only; With Instruments; Type; Classification
DIAMOND SIMULANTS : Gadolinium Gallium Garnet (GGG); Yttrium Aluminium Garnet (YAG); Strontium Titanate; Synthetic Rutile; Synthetic Cubic Zirconia; Synthetic moissanite; Spinet; Sapphire; Zircon; Topaz; Quartz; Paste; Doublets
PRACTICALS : Clarity Grading, Yield estimation and planning of Rough Diamonds, Clarity, Cut and Colour grading of polished diamonds
SYLLABUS
(Applicable for a batch of minimum 2 students)
Duration : 30 hours – 10 days
Days : Mon – Fri.
Timings : 2.30 pm – 5.30 pm (daily 3 hours for 10 days) (Monday to Friday)
