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Aeschynite-(Ce) (or Aschynite, Eschinite, Eschynite) is a rare earth mineral of ceriumcalciumironthoriumtitaniumniobiumoxygen, and hydrogen with formula: (Ce,Ca,Fe,Th)(Ti,Nb)2(O,OH)6. Its name comes from the Greek word for "shame". The "-(Ce)" means it has more cerium than the yttrium variety aeschynite-(Y). Its Mohs scale rating is 5-6.

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General Information:
 Chemical Formula:
(Molecular Weight = 305.70 gm)
Calcium 3.93 % Ca
Cerium 27.50 % Ce
Titanium 27.41 % Ti
Niobium 7.60 % Nb
Iron 1.83 % Fe
Hydrogen 0.33 % 
Oxygen 31.40 % 
 Empirical Formula:
Nepheline syenite rocks.
 IMA Status:
Approved IMA 1987
TL: Russia, Chelyabinsk, Il'men Mountians.
 Name Origin:
Named for its composition and from the Greek for "shame," in allusion to the inability of chemists, at the time of its discovery, to separate some of its constituents.
Physical Properties:
brown, brownish black, yellow, or black.
Transparent to translucent
Massive - Uniformly indistinguishable crystals forming large masses., Acicular - Occurs as needle-like crystals.,
5-6 - Between Apatite and Orthoclase
Adamantine - Resinous
brownish black
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