R

Ralstonite

Ramsbeckite

Ramsdellite

Rankachite

Raspite

Rathite

Realgar

Red beryl

Reichenbachite

Rhabdophane

Rhodochrosite

Rhodonite

Rhönite

Richelsdorfite

Riebeckite (Amphibole Supergroup)

Ripidolite

Robertsite

Rockbridgeite

Roedderite

Romanèchite

Rosasite

Roscherite

Roselite

Rubellane

Rubellite (Tourmaline Group)

Rutile