To me it doesn't look like titanite. The angles are totally wrong and
the flat sides. (looking at picture #17, Crystal shape 2 reflected light
x40) For me it looks more like a pyroxene crystal.
Anyhow, it's an easy test for a microprobe.
Good luck and thanks for the look!
/Göran
Mr EMan
Hello Jim,
The brown opaque elongated lozenge-shaped crystal(s) which are in cross section
in the thin section, very much resembles titanite CaTi[O|SiO4] formerly known
as sphene. The cross-section shape is classic for sphene IMO. Sphene is
something like 2.5 to 3 times longer on the width
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