La Prairie Cosmetics. CELLULAR RADIANCE CONCENTRATE PURE GOLD. La Prairie has used the powers of 24 carat pure gold to create the most immediate and lasting treatment. It is a super serum that reaffirms, restructures, illuminates, rejuvenates the skin and manages to reduce age spots. The rejuvenating action is enhanced as it contains liquid quartz crystals and reflective pigments. On the other hand, 24-carat gold dissolved with colloidal gel, a La Prairie exclusive ingredient, immediately melts into the skin to reduce breakdown of collagen and elastin, helping to maintain elasticity and firmness of the young skin.