Citrine 2mm round. Citrine belongs to the quartz family. Color ranges from lemon yellow to egg-yolk yellow, to orangy or brown amber color. Most citrine is heat-treated amethyst or smoky quartz. Natural color citrine is rare so it is common to see pale yellow in its color shade. Though gems are worn for their intrinsic beauty, we pick which gemstones to use in our jewelry for aesthetic reasons, on how they look. Gemstones come in different colors, grade, and each is unique from each other. Designing your jewelry will depend on your personal style and color preference.