As you want address of factory of Gitanjali Gems located in MIDC Andheri (E) area, so here is following address:

Gitanjali Gems
A-10, P.S. House MIDC,
Marol, Andheri (E) Mumbai ,
Maharashtra - India

Here I am giving address of other factories of Gitanjali Gems for your reference:

Registered Office
A-1, 7th Floor, Laxmi Tower, Bandra - Kurla Complex, Bandra (E), Mumbai , Maharashtra - India Pincode : 400051
Phone : 022-40354600,,,
Fax: 022-40354602,

Factory
Dattapada Road, Opp. Cable Corporation of India Limited Borivali (E) Mumbai , Maharashtra - India Pincode : 400066

Factory
Plot No.61, SEEPZ, Andheri (E), Mumbai , Maharashtra - India Pincode : 400096

Factory
Plot No.16 (Part), 17,28,29 (Part), SEEPZ, Andheri (E) Mumbai , Maharashtra - India

Factory
Surat Special Economic Zone, Unit No. 378, Plot No.24 Surat , Gujarat - India

Factory
Plant no. 52, B Rama Road New Delhi , Delhi - India Pincode : 110019

Factory
Diamond Part 2, 2nd & 3rd Floor, Opp. Savani Estate, Varachha Road, Surat , Gujarat - India Pincode : 395006

Factory
Basement & Ground floor, G-185, EPIP, Sitapura Industrial Area, Jaipur , Rajasthan - India Pincode : 302022