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.