Genthelvite Visible Spectra (380 - 1100 nm)

• Gehthelvite GRR 2791 spectrum, 0.345 mm. This is blue genthelvite from the El Criollo Mine, Cordoba, Argentina. Data File . The color comes from Co²⁺. The spectrum also shows weak features from Fe and possible Mn²⁺.
• Gehthelvite CIT 9305 spectrum, 0.041 mm thick;  VIS region, plotted as 0.5 mm thick; Genthelvite from Diamond Hill, Rhode Island, USA.  This is a pink crystal. The visible region spectrum was taken on a 0.342 mm thick slab and plotted as 0.5 mm. The near-IR spectrum arises from Fe²⁺ is a four-coordinated tetrahedral site.  Data Files thin ; thick

Link to references about the spectra of genthelvite

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