R

Ralstonite

Ramsbeckite ?

Ramsdellite

Rankachite

Rathite

Realgar

Reichenbachite

Rhabdophane

Rhodochrosite

Rhodonite

Rhönite

Richelsdorfite

Riebeckite (Amphibole Supergroup)

Ripidolite

Robertsite

Rockbridgeite

Roedderite

Romanechite

Rosasite

Roscherite

Roselite

Rubellane

Rubellite (Tourmaline Group)

Rutile