Gahnite - IR Reflectance spectra

• Blue gahnite – 2.02 ct crystal – Kagoro Hills, Kaduna State, Nigeria

• Dark-green gahnite – 0.24 ct crystal – Pico Das Almas River, Paramirim Das Crioulas,
  Erico Cardoso, Bahia, Brazil

Blue gahnite – 2.02 ct crystal – Kagoro Hills, Kaduna State, Nigeria

Dark-green gahnite – 0.24 ct crystal – Pico Das Almas River, Paramirim Das Crioulas,
 Erico Cardoso, Bahia, Brazil