Traces of valuable minerals are so general in the Republic that it is said there is hardly a commune where a more or less abundant mineral deposit is not found. The exceptions are the lands of recent coralline formation, such as the municipality of San Pedro de Macoris and the southern portion of the commune of Higuey. The magnet which attracted the Spaniards at the time of the conquest was the island's mineral wealth, especially the gold deposits. It is a historical fact that large quantities of gold in dust and nuggets were collected during the first years of Spanish colonization. According to the Spanish writers, from 1502 to 1530 placer gold was produced to the value of from $200,000 to $1,000,000 per annum. The fleet which set out in 1502 and was wrecked by a hurricane before leaving the coast waters of Santo Domingo was laden with gold mined in the island. A tribute of a small amount of gold each year was imposed on half the Indians of the country. Much of the gold came from the mountains behind Santiago and La Vega, from the gold-bearing sands of the Jaina River, around Buenaventura, and from the vicinity of Cotui, then called "Las Minas." Ancient pits are still to be found in all these places. At La Vega a mint was established for coining gold and silver. A nugget of extraordinary size was found by an Indian woman in a brook near the Jaina River; her Spanish masters in their exultation had a roast suckling pig served on it, boasting that never had the king of Spain dined from so valuable a table. The Indian received no part of the gold: "she was lucky if they gave her a piece of the pig," remarks Father Las Casas. This nugget was purchased by Bobadilla to send to Spain, and went down with the 1502 treasure fleet. The gold deposits found by the Spaniards were the surface accumulations of centuries. When these were exhausted and the supply of cheap labor fell off owing to the dying out of the Indians, the mineral production waned. In 1502 labor difficulties caused a temporary cessation in mining. In 1511 many mines were definitely closed because of the scarcity of laborers and because the cultivation of sugar-cane offered surer profits. Then came the discovery of mines of fabulous wealth in Mexico and Peru, and the interest they aroused, as well as the lack of labor in Santo Domingo, caused the mines of the island to be completely neglected. Finally, in 1543, mining work ceased and by a royal decree all mines were ordered closed. Prospecting and desultory mining, especially placer mining, have been kept up, however, until the present day.