Mineral/rock

Derived from or for

Danburite

locality at Danbury, Connecticut

D' Ansite

Jean D' Ans (1881- ), German chemist, professor, Berlin

Darapskite

for Ludwig Darapsky (1857-?), mineralogist and chemist from Santiago, Chile

Datolite

Greek = to divide due to granular character of some varieties

Dawsonite

John William Dawson (1820-1899), Canadian geologist, principal of McGill University, Montreal, Canada

Diamond

Latin adamas = unconquerable or invincible; first used in Manilius (AD 16)

Diaspore

Greek dia = through and speirein = to scatter in reference to its characteristic decrepitation on heating

Dickite

Allan Brugh Dick (1833-1926), Scottish metallurgical chemist

Diatomite

Latin from Greek dia = through and tome = cutting in reference to the two generally symmetrical valves of the single-cell diatom

Dietzeite

August Dietze (?-1893?), who first described the mineral

Diopside

Greek diopsis = to view through since it is usually transparent

Dolomite

Deodat Guy Silvain Tancrède Gratet de Dolomieu, French geologist 

Dumortierite

Eugène Dumortier (1802-1873), French paleontologist

Dunite

named for its type locality at Dun Mountain, Nelson, New Zealand

Dysprosium

Greek dysprositos = hard to get at in reference to the difficulty of separation