Refract meter, Polariscope, Microscope, Spectroscope, Ultraviolet lamp , Hardness pencil           Diamond probe, Chelsa  filter, 10x lens. MM Watch, optimizer, sieve  etc

Properties of Diamond                                                     

The physical properties of diamond and their practical exploitation. Dispersion and ‘fire; total internal reflection; reflectivity and luster;brilliance.

Directional optical properties; durability, specific gravity (SG), electrical properties; thermal properties; wettability.

Non – optical directional properties; ‘grain’ cleavage, differential hardness and crystal from in relation to the crystal structure of diamond; their significance in identification and manufacture.

4 C’s of Diamonds and grading                                    

Cut Grading of diamonds : Ideal proportions for diamond brilliant cut (GIA)

• Table angle and depth
• Crown angle and height
• Girdle thickness and angle
• Pavilion angle and depth
• Clarity Grading
• Types of inclusions in diamond
• Types of Blemisses
• Percentages of inclusions and blemisses
• Clarity chart (GIA)
• Color Grading
• Using color master
• Color scale of diamond (GIA)
• Carat Weight and size
• Unit weight of Cents(Ct) carat weight
• Use of Millimeter Gauge

Color in Diamond                                                                    

• Grade diamonds in the D-to-Z color range

• Detect laboratory-grown diamonds, treatments, and stimulants

Clarity grading                                                            

• Practical clarity grading
• Internal & External features which effects clarity grading
• Grading and sorting of diamonds from small size to solitaire
• Examine various diamond samples with 10x lens and under microscope. Practice of grading them according to grading charts.