The UV-visible spectra of hiddenite show features
corresponding with those of chromium-bearing green
jadeite (figure 4). The characteristic 437 nm absorp-
tion band of Fe3+, commonly present in natural
jadeite with various green hues, is about 1 nm higher
in hiddenite. The narrow 691 nm absorption band of
Cr 3+ is virtually the same in both minerals.