Tin Mines
Cornwall and Devon tin mines (almost monopoly in Christian Europe)
Okehampton (Devon) · High Medieval · 300% · Britannia · Catholic.
Al-Andalus (Ocsobona) was a main source of Tin for the Islamic world that were exhausted after the Christian occupation
Mertola (Ocsobona) · Early Medieval · 100% · Iberia (Muslim) · Muwalladi.
Erzgebirge, as a late Central European source that complemented Cornwall and Devon
Freiberg (Freiberg) · Late Medieval · 100% · Germania · Catholic.
Zinc Mines
Zinc (Calamine) – important in the east, mainly India, for Brass (coupled with Tin here due to the same purposes).
Ca14: 10th-11th c. Zinc and Lead
Kaisereia (Kaisaria) · Late Medieval · 100% · Byzantium · Orthodox.
Zawar mines. from 900 CE
Candravati (Zawar) · Early Medieval · 200% · India (North) · Svetambara.