MAC Black Line is a very warm-toned, very dark green with a metallic finish. It is a permanent eyeliner that retails for $15.00 and contains 0.04 oz.
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MAC Black Line Pearlglide Intense Eyeliner ($17.50 for 0.04 oz.) is described as a "black with gold pearl." It's a dark black with lots of gold and olive bronzer with subtle warm undertones. It was nicely pigmented in a single stroke, but I noticed that this was more shimmery than the last one of these I swatched (it's part of the permanent range). The only dupe I could think of is Shiseido Black Sand, but it's not as gold.
Looking for something similar or to see what you have in your stash? Here are some of the top dupes for this product!
An eye pencil that provides rich, luxurious color with a touch of shimmer and sparkle. Soft, smooth, creamy formula glides on for a perfectly intense line, yet its soft texture allows you to blend. Long-wearing. Smudge-proof.