They permitted photography (but no flash) of all except one painting in the exhibit. Here is that full painting. It's the earliest one in the exhibition. His work is very rich and densely packed with details, story telling and ornamentation. He uses a lot of gold leaf and three dimensional elements often embossed or carved, to make the surface even richer.
They set up a great website about his work. http://crivelli.gardnermuseum.org/
