Minerals Containing Niobium

MURMANITE (Hydrated Sodium Titanium Niobium Silicate)
COLUMBITE (Iron Magnesium Manganese Niobium Tantalum Oxide)
TANTALITE (Iron Manganese Tantalum Niobium Oxide)

Niobium is placed as the 32nd out of 103 elements with respect to its abundance in the Earth's crust, at 20 parts per million (grams per metric tonne). Only 82 of these elements occur in detectable amounts- 10 can be detected only as random traces, and 11 are not detectable in nature.