They draw attention to the resemblance of this bronzite to that in the meteorite of Breitenbach. If, with Tschermak,'2 we
draw the line between bronzite and enstatite at a content of 5 per
cent, of iron protoxide, it will be seen that our mineral is just on
that line; and thus, as having an intermediate composition, may be
called with equal propriety either bronzite or enstatite.
The
bronzite sometimes alters into biotite, which may occur in it in scales
or plates which appear to be secondary. It also alters into bastite,
which often entirely replaces the bronzite, and may be quite an
abundant constituent. Bastite is distinguished from bronzite by a faint
yellowish colour,
