R

Ralstonite

Ramsbeckite

Ramsdellite

Rankachite

Rathite

Realgar

Rhabdophane

Rhodochrosite

Rhodonite

Rhönite

Riebeckite (Amphibole Supergroup)

Ripidolite

Robertsite

Rockbridgeite

Roedderite

Rosasite

Roselite

Rubellane

Rubellite (Tourmaline Group)

Rutile