Area of origin
Area of use
A principal vein or zone of veins of gold or silver ore. Used metaphorically to refer to the origin of something valuable or in great abundance.
The term probably came from a literal translation of the Spanish veta madre, a term common in old Mexican mining. Veta in Spanish means either the grain of wood or a vein, seam or lode. Lode is derived from the Cornish “to lead”.