I will tell you a story, to see how tough they are.
A lady from China took some jewellery out of Australia, on departure to China.
She must have claimed back the GST, the jewellery was very expensive.
She came back to Australia, and they popped her or pinged on her return.
She was dumb enough to bring back the receipt, and the packaging of the jewellery.
The jewellery was hard to find, but it was on the person.
She in the end got pinged, can't remember how much.
Either declare it, and be honest, and be prepared to pay duty/GST on it being re imported, or leave it in India.
They can be very strict, you know who I mean, boys and girls in dark blue, on people from that side of the world, I should know, every time I go to Singapore/Malaysia, and come back, I get pinged.
Coming back from NZ, no problem.
Please don't make it harder on entry, no food, no unreported items, as an Australian Citizen, you can use Smartgate, and usually, with that, you are not pinged, unless they want to bring up their tally numbers.
99% of the time, with Smartgate ticket, and incoming pax card, (with nothing to declare), they let you through quite quickly, unless they suspect something.