It is a secondary mineral which contains magnesium, uranium and carbon.

Cement is a secondary mineral that forms after deposition and during burial of the sandstone.

It occurs as a secondary mineral found in a number of geological environments.

Members of the triphylite-lithiophilite series readily alter to secondary minerals.

They are the only two places that have been known to produce the secondary mineral.

Marcasite can be formed as both a primary or a secondary mineral.

It is therefore known as a secondary mineral.

Naturally occurring uranates are rare and always occur as secondary minerals.

He was honored due to his support of research into rare secondary minerals.

Additionally, it is most commonly found as a secondary mineral in granite pegmatite.