Besides timber Crete exported food, cypress wood, wine, currants, olive oil, wool, cloth, herbs, and purple dye. Its imports consisted of precious stones, copper (most likely from Cyprus), ivory, silver, gold, and other raw material. They also imported tin that was used in the production of bronze alloys. Interestingly, the nearest known tin mines appear as far as Spain, Britain, central Europe, and Iran. Besides raw materials, the Minoans also adopted from the surrounding cultures artistic ideas and techniques as evident in Egypt's influence on the Minoan wall frescoes, and on goldsmithing production knowledge imported by Syria.