According to Guerlain:
'Instant radiance to reveal a perfect complexion. Gold is the most precious of metals. Pure, it reflects light in an extraordinary and unfailing way. To light up the complexion, Guerlain has chosen to include 24-carat gold in a hydrating and soothing gel. The gold gas been fashioned into precious flakes using a unique time-honoured method, to integrate them magically into the gel. As though suspended in the air, the flakes sparkle to reveal their precious treasure: radiance. The complexion is immediately awakened, thanks to the formula's extreme hydrating action: +112% after two hours and 93% after 6 hours (instrumental test).'

The base is housed in a beautiful glass bottle, which feels quite heavy and of good quality. The base itself is extremely lightweight. It melts so easily onto the skin, dispersing and evenly distributing the gold flakes. There is a slight fragrance to it which is subtle and pleasant. The base is very luxurious and feel so fresh and cooling on my skin. I found that it helps keep my skin quite moisturised too. The gold flakes disperses into very tiny gold shimmer particles, leaving an amazing glow.
It looks great alone or under makeup. I sometimes just dab a small amount onto my cheeks to give them a great dewy sheen. A little of this product goes a very long way. I've had this bottle for a year and there's still so much of it left. (It has a recommended shelf life of a year though, so might need to replace it at some point).
Here is a pic of me taken from a previous FOTD post, with the base and a little BB cream on top.
This base looks great under powder foundation too. Here is a pic of me & fellow scientists at some party at a genetics convention in Rome, wearing the base under powder foundation.
Pros:
- lightweight, yet luxurious feel
- gives skin an incomparable dewy, radiant glow
- slight moisturizing effect on skin
- looks great on its own, and under liquid or powder foundation
- very easily applied onto the skin
- non greasy
- only a little is needed, so product lasts a long time
Cons:
- expensive at £40