Tanzanite እንደ ክሪስታል ዝንባሌ ላይ በመመርኮዝ ተለዋጭ ሰማያዊ ፣ ቫዮሌት እና ቡርጋንዲ በሚታይበት ሁኔታ በጣም ጠንካራ በሆነ trichroism ይታወቃል ።
Tanzanite's are noted for their remarkably strong trichroism, appearing alternately sapphire blue, violet and burgundy depending on the crystal orientation.