Gold prices are far off their soaring levels from two years ago, but investors can at least count on one factor supporting prices this year—a stronger appetite for the precious metal in India.

An employee adjusts gold jewellery on display at the global B2B Jewellery and Gem Fair in New Delhi.

Renewed optimism in India's economy has encouraged more buyers there to buy during Diwali, a five-day festival of lights whose celebration peaks on Thursday.