glyptics                the art of engraving on gems.
curiosa                 books on unusual subjects; erotica.
sphragistics            the study of seals and signets.
pyrognostics            the properties of a mineral under a blowpipe flame.
ana                     a collection of miscellaneous information on a
                        particular subject; an element in such a
                        collection.  [from -ana]
thaumatology            the study of miracles.
koniology               the study of atmospheric dust.
cryptometer             an instrument for measuring the opaqueness of
                        a coat of paint.
arcanist                a person having occult knowledge of ceramics,
                        especially about the making of porcelain.