Bobbi Brown Island Plum is a moderately warm-toned, medium-dark plum with a pearl finish. It is a permanent blush that retails for $36.00 and contains 0.31 oz.
Bobbi Brown Island Plum Glow Stick ($36.00 for 0.31 oz.) is a medium-dark plum with subtle, warm undertones and fine, cooler pink and warmer gold pearl. This was one of the more visible shades in the range, though it still had sheerer coverage (semi-sheer) that wasn't buildable but didn't sheer out to nothingness when blended either. I did find the more noticeable color to be harder to even out on bare skin, though.
It's supposed to be a "creamy, lightweight highlighter" with "sheer" coverage that gives "an instant, sun-kissed glow that lasts all day." It had a very slick, emollient consistency that never dried down, so it moved and migrated on the skin, and it also caught any flyaway hairs (or dog hair, in my case). The blush had a glowing finish on the skin but little wear time--three hours--and did not play well with products (primers, cream/powder/liquid foundations or blushes).
FURTHER READING: Formula Overview, which is a detailed review of the range as a whole.
Like sunshine in a stick—this creamy, lightweight highlighter glides on skin to deliver an instant, sun-kissed glow that lasts all day. Available in shimmer, soft shimmer and flat finishes. The ultimate no-mirror highlighter, this sheer, emollient-rich formula goes on easy and blends seamlessly for natural, healthy-looking color. Just throw it on, blend and glow.