Christ as a portrait with more detail. Russian Orthodox Icon.  IC XC are the first and last letters of "Jesus Christ" in the Church Slavonic alphabet. The line over the letters indicates that the middle letters are omitted. The words to the left and right of Christ translate "The Lord Almighty".

Sizes: 

#492 - S (2½" x 3" on ½" wood). 
#A615 - M (3½" x 4" on ⅝" wood). 
#A980 - ML (5" x 6¼" on ¾" wood). 
#1319 - L (6¾" x 8¼" on ¾" wood).  

Icons manufactured by a Russian supplier using their proprietary process of applying successive layers of color and metallic-like patterns resulting in a brilliant, detailed, and nearly three dimensional appearance.

Icon inscriptions in Church Slavonic.