Phenakite group - IR Reflectance spectra Phenakite group Index IR-Reflectance Photoluminescence UV-Vis-NIR Phenakite: Colorless phenakite – 0.50 ct – Unknown locality Eucryptite: Gray eucryptite/albite – 1.56 ct – (Londonderry, Nepean, Coolgardie), Australia Willemite: Very-light-yellow willemite – 0.42 ct – Franklin, New Jersey, USA Colorless phenakite – 0.50 ct – Unknown locality Gray eucryptite/albite – 1.56 ct – (Londonderry, Nepean, Coolgardie), Australia Eucryptite is intergrowned in albite, this spectrum shows only albite features. Very-light-yellow willemite – 0.42 ct – Franklin, New Jersey, USA
