Illamasqua Bacterium is a slightly warm-toned, dark duochrome with a pearl finish. It is a permanent nail lacquer that retails for $17.00 and contains 0.5 oz.
Illamasqua Bacterium Nail Varnish ($14.00 for 0.5 fl. oz.) is described as an "opalescent beige" with a shimmer finish. It is a really intriguing shade, and I think those who tend to collect nail polishes may appreciate this shade in particular. It's just weird--in a good way--it's this cross of green, beige, and brown with threads of silver and iridescent opal. The base color reminds me most of khaki--brown with this murkiness--but the way the opal shimmers and reflects light adds interest to the shade.