Wax casting of invisible gem setting

Dear Sir,

I wish to know the feasibility of wax setting of different types of
Gemstones and Synthetics in Gold and Silver Jewellery as compared to
Real Diamonds.

What are the advantages and disadvantages of this type of settings?

IT may be stated that the popularity of invisible setting is
increasing day by Day but the jewellers in India are charging
exorbitant charges for the same, can some one explain this technology
in sept by step detail?