best mascara i've ever used. in brownish black.

I use the same (or similar) kind from that brand!
Physician's Formula Organic wear®100% Natural Lash Boosting Mascara (in Ultra-Black)
One claim is that it contains a serum to boost lash growth, protect present lashes. I have fairly thick ones to begin with, and I haven't seen much difference in that regard. I'll usually to go w/mascaras that contain 'serums' because they do tend to be more moisturizing than others.
The overall effect of this mascara well surpassed my expectations. The brush bristles are super-short and very hard, compared to others. Perfect separation, never any clumps. Lashes stay soft all day, too (even after it dries, which does take slightly longer than other brands I've used). You don't have that gross, stiff, dried-out result. I assume it's the beeswax in the product.
It does wash off easily with some eye makeup remover (and yes, it runs if you cry), but I've always heard waterproof mascaras were quite bad for you.
Anyway, highly recommend. You can find it easily in drugstores.
Physician's Formula also carries a nice broad-spectrum SPF-30 loose powder I like a lot. High concentrations of Zinc Oxide, which is a great physical UVA/UVB barrier. Not as a primary sunscreen, though, as powders and sprays are not recognized by the FDA as effective sun protection. Every little bit helps though, right?
Physician's Formula Mineral Wearâ„¢Talc-Free Mineral Airbrushing Loose Powder SPF 30 (in Translucent Light)
I like that the brush is connected by a magnet inside, and also has a plastic cover to protect it from other cosmetics or dirt, but the overall 'egg' shape is a bit cumbersome if you take it with you places for touch-ups. Usually the clear cover cracks after a month or so, but it still holds together, ime.
It does deliver a nice airbrushed-looking result. Gentle on skin, too.
Shades run a bit dark, so I'd suggest going a shade lighter than usual if any of you wanna try it.