Spectroscopic Study on the Species and Color Differences of Gem-Quality Red Garnets from Malawi

Table 1

Characteristics and attributes of the infrared absorption peaks of the purplish-red and maroon-red garnets.

Absorption peaks of the garnet samples (cm^−1 )		Attributions of the absorption peaks	Absorption peaks of the pyrope end-member [24]
Purplish-red	Maroon-red
970	967	νas (Si–O–Si)	964
904	904		893
874	874		865
644	644	δas (Si–O–Si)	—
608	—		—
575	571		570
534	532		—
477	477		477
459	456	δ (Al–O–Si)	452