Can you please provide the list of best Diamond Institutes located in India ?

Here is the list of few best Diamond Institutes located in India which you are looking for .
Indian Institute of Jewellery (IIJ)

Modern Centre, Sane Guruji Marg, (Near Saat Rasta), Mahalaxmi East
Mumbai, Maharashtra
(022) 67444351, 67444358, 23075787
8689811157, 9833741417, 9833741418

Jewellery Design & Technology Insitute (JDTI)
S.C.O. No.409-410, Sector 35-C
Chandigarh, Chandigarh

Rhea Studio of Jewellery Design
Level 3, Above Popley & Sons, Jn. of Turner & Waterfield Roads, Bandra (W)
Mumbai, Maharashtra

The Jewellery Design & Technology Insitute
#A-89, Sector-2
Noida, Uttar Pradesh
(0120) 4057777, 2540571, 2540572, 2540573

Academy of Aviation and Professional Excellence
Parco Building, IInd Floor, Railway Station Link Road,
Calicut, Kerala

Efforts Institute of Management And Technology
C-1/2, Mohan Garden, (Near Gurudwara Road), Uttam Nagar, Near Nawada metro station
New Delhi, Delhi

Gemmological Institute of India (GII)
29, Gurukul Chambers 187-189, Mumbadevi Road,
Mumbai, Maharashtra

Indian Diamond Institute
Katargam, GIDC, Post Box No. 508 Sumul Dairy Road
Surat, Gujarat

Sai Education Cell
G-55, Kiran Garden, Near Piller No-714 Nawada Uttam Nager
Delhi, Delhi