Structural Evolution of Burmese Amber during Petrifaction Based on a Comparison of the Spectral Characteristics of Amber, Copal, and Rosin

Figure 2

Infrared spectra of amber, copal, and rosin samples: (a) amber samples (A-1, A-2, and A-3); (b) copal sample (KB); (c) rosin sample (SX). (d) Comparison of amber, copal, and rosin (the amber spectrum shown in the average of the three amber samples).

(a)

(b)

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(d)