large scale indiscriminate fishing activity near the island recently, fish stocks have been depleted, and thus the fishing businesses have declined considerably. The main export of the island is its granite which is one of the best quality in the world. Sand has also been constantly exported, mainly to Singapore for land reclamation. Indonesian has however limited sand exports over concerns with Singapore's reclamation projects, and banned them outright in the beginning of 2007. See also Little Karimun, a smaller island just northeast of Great Karimun Karimun Jawa, an unrelated archipelago off the north coast of Java References External links Riau Archipelago Landforms of the Riau Islands Islands of Sumatra