trying differnt things with your camera is dang good advice! my camera has several lighting settings as well, one has blue control, one for sunlight, one for indoor lighting. each has a color difference for capturing true colors. Sometimes the hard part is getting a true shade of pink to show, expecially in glass for some reason. But I know i have said this before, but using a matte blue background can help sometimes. Something to do with how the digital cameras see the colors I guess. Should you ever encounter the problem. try the blue, it usually works.
(lol Kevin... yeah I take mine serious too... obviously )
ps... nice Cat, love the aventurine