Fingerboards are West African Ebony (Diospyros crassiflora)
Nuts and saddles are Indian Ebony (Diospyros ebenum)
Ebony alternatives (NERO) can be found here.
An older article from Bob Taylor about the future of ebony can be found here.

Ebony Alternatives: Fingerboards, Nuts & Saddles

The Nero material is made in the USA from eucalyptus paper and thermosetting resins. It is pure black and mimics the finest Madagascar ebony. It is hypoallergenic and not susceptible to humidity or temperature change. The surface is impermeable to sweat and body fluids and therefore very easy to clean.

Alert!