Tortoiseshell is a material produced from the shells of species of tortoise and turtle, mainly the hawksbill sea turtle.

Tortoiseshell or tortoise shell may also refer to:

Turtle shell, the shell of a turtle or tortoise Tortoiseshell cat, a cat coat coloring Tortoiseshell butterflies, brush-footed butterflies (Nymphalidae) in the genera Aglais and Nymphalis "Tortoiseshell", a song by The Boo Radleys which appeared on their EP Every Heaven

See also Small tortoiseshell, a colourful Eurasian butterfly in the family Nymphalidae Tortoise (disambiguation) Turtle (disambiguation) Shell (disambiguation)