Steps to assort Star & melee diamonds by clarity under a Microscope:

Identification & Preparation:

Identify the origin of diamonds whether it is natural, labgrown or mixed with any simulant. Clean diamonds using an ultrasonic or steam cleaner. Set up a gemological microscope with 10x to 60x magnification and darkfield illumination.

Initial Screening:

Perform a quick inspection at 10x to separate heavily included stones from cleaner ones.

Clarity Grading:

Increase magnification (20x or 30x) to assess inclusions.

Examine for type (crystals, feathers, pinpoints), size, location, and number of inclusions.

Use both dark field and brightfield lighting for different inclusion visibility.

Assign Clarity Grade ( Clarity Standards at Naturalmark Lab ):

FL/IF: No internal flaws.

VVS1/VVS2: Minute inclusions, very difficult to see.

VS1/VS2: Minor inclusions, difficult to see.

SI1/SI2: Noticeable inclusions under 10x magnification.

I1/I2/I3: Obvious inclusions affecting transparency.

Grouping and Labeling: Group diamonds by clarity grade. Label and store securely in separate containers.

Verification: Double-check and verify clarity grades for consistency.