I referred to my book "Painting Vibrant Watercolors" by Soon Y. Warren. Her paintings are magnificent and I find her technique very inspiring. She is a watercolour artist, but her paintings are almost photorealism. The detail and technique is amazing. There is a whole chapter in her book on how to paint crystal vases. So I read it carefully and tried to apply some of the techniques such as leaving areas of reflection white, painting in the shapes that the light refractions make. My vase is much simpler in shape than a cut crystal vase, so it was not as time consuming or as difficult as I originally thought it would be. I'd like to try to paint a cut crystal vase one day. That would certainly be a challenge !!