I suggest you take a picture of natural light first. Jewelry with many colors will show different colors in different lighting environments. The green and violet of jadeite sometimes show different colors under artificial light, so there is a saying in the industry that "the color can't be seen under light".

Color-changing jewelry is Alexandrite, and of course some artificial gem can change color.

The valuation of jewelry needs to be comprehensively evaluated from the aspects of color, size, cleaning defects and workmanship. And unlike gold, it is priced in grams.