Retail options are rather limited in the Maldives, being divided between the capital, the airport, and the resorts. Unless you're shopping for food, Malé provides little in the way of original souvenirs. The exception is thudu kuna - locally woven mats,
Tourist-oriented shops clustering together offer much the same (slightly tacky) wares, many of which may have been imported. There's a slightly broader selection at the airport, while resort boutiques often carry some unique designer jewellery and similar items (with prices to match).
Note that the export of anything made of pearl oyster shell, or black or red coral is prohibited.