Guerlain Happy Glow Pearls is a neutral-toned, very light translucent with a natural finish. It is a limited edition powder that retails for $65.00 and contains 0.88 oz.
Guerlain Happy Glow Pearls Meteorites ($74.00 for 1.0 oz.) is a soft, pink-tinted white base with fine pink, gold, and lavender sparkle over a semi-matte finish. The Meteorites Pearls formula is supposed to "delicately color-correct and illuminate the complexion" with the brand's typical violet fragrance.
Though I don't recall it being marketed as a setting powder (always more of a finishing powder), Guerlain's website says to use it all-over the face to "fix make-up and improve hold" under directions and that it can be used to highlight the face as well. This particular combination of Meteorites did seem to have more substance--more powder in a way--so I could see how it might work as a setting powder. In fact, this season's Happy Glow Pearls seemed to blur my skin just slightly without making it appear totally matte like some setting powders might, though I would not describe it as illuminating or luminous either. There was less noticeable sheen or luminosity to the powder and more in the way of visible sparkle. The problem I had was that if I really pressed it into the skin like I would a setting powder, it sometimes left a whitish cast against my skin tone. If I applied it more like a finishing powder (more lightly dusted), I didn't get any cast. It only extended the wear of my foundation by a half hour, which is shorter than most setting powders for me.
I normally like a lot of the Guerlain Meteorite Pearls, but this one just had such minimal impact compared to past versions (including their permanent ones). I think as a setting powder, it falls even shorter.
Each shade of Météorites Pearls begins with the same legendary combination of 3 colors which adapt to every skin tone and collectively work to beautify skin: mauve catches the light, pink refreshes and yellow counters dullness and corrects redness. These delicate and perfectly round pearls continue to be shaped by hand, with craftsmanship mastered by only 4 people in the world. Softer than ever, the new pearls allow for an even easier application and a more visible effect with every brushstroke. These precious pearls are contained in a beautiful metal tin, now marked with a new emblem of a reinterpreted rosette created with a light gradation of pink.