Nicaragua has moderately sized gold and silver deposites. These reserves are estimated at 3.8 and 4.9 million ounces of gold and silver, respectively. All natural resources are on state property and exploitation rights are leased. Nicaragua is also known to contain: copper, zinc, platinum, iron, magnesium, chrome, titanium, tungsten, lead, cadmium, bismuth, bentonite, marble, clay, masonry stone, limestone, gypsum. Although the reserves of minerals are not extremely large, the sector's growth has been. Last year the minerals sector grew at a rate of 23% and the two years before that sported 17.5% growth.