Abstract: The gem microscope， polarized light microscopy and conventional gem identification equipment， infrared spectroscopy， X fluorescence spectroscopy， grating spectral analysis， the horny-coral gem features for the preliminary The results showed that: horny corals of almost pure composition of organic matter， and its main components for iodine (I) elements， a secondary component for chlorine (Cl)， bromine (Br)， barium (Ba)， sulfur (S) Through the measured， to obtain their physical， optical and chemical characteristics of such Through polarized light microscopy studies， discussed the growth mechanism and its layered structure of the causes， but also explore the coral reef of the infrared spectral
