I have been to hyderdad and stayer there for.more than 2 years, I had the oppurtunity to explore the place being travel geek by nature.
I would highly suggest you to visit the place atleast onece not only for pearls for your beloved but come with your family to witness the disverty that it offer on old and new hyderabad. technology and hi-tech gaint organisation is what new hyderabad whereas on the other side old city, hyderabad will give you the vintage feel, full of crowd and noises.
Don't forget to check out the pearls you will get in the old city of hyderabad.