This scapolite prism shows its dark orangey C-axis color on the top face and its straw yellow color from the side (the A-axis, at 90° to the C-axis). This prism was cut to show both colors in the same piece. Photo © Joel E. Arem, PhD, FGA. Used with permission.
Article: Dichroscope Guide for Gemologists
Credit: Joel E. Arem, PhD, FGA
|Natural or man made||Natural|
|Photo pleochroism||Dichroic (2 colors)|