Century Dictionary and Cyclopedia
- n. A rare mineral occurring in massive forms of a velvet-black color. It is a silicate containing titanium, iron, the cerium metals, and other elements; its exact composition is doubtful.
“The placer gravels contain abundant chevkinite, eudialyte, ilmenite, monazite, tscheffkinite, and zircon and minor to trace allanite, cassiterite and thorite.”
‘tscheffkinite’ hasn't been added to any lists yet.
Looking for tweets for tscheffkinite.