mother lode

idiomPart ofmother

mother lode — idiom

1. a very rich source of something valuable, originally referring to a rich vein of

1.idiom
Definition

a very rich source of something valuable, originally referring to a rich vein of gold or silver in mining

Example

The archaeologists discovered a mother lode of ancient pottery buried beneath the hill.

For a food blogger, finding that spice market was like hitting the mother lode.