More examples of ordinary moles: (a) a uniformly tan or brown skin discoloration, 1 to 2 mm in diameter, (b) a larger skin discoloration, (c) a mole that is slightly raised above the surface of the skin, (d) a mole that is more clearly raised above the skin, and (e) a pink or flesh-colored mole.
All of these are normal, and even a single mole may go through these stages over time. However, all of them have a smooth border and are clearly separated from the surrounding skin, in contrast to a melanoma tumor.

normal mole
This gallery of photographs will alternate between normal, benign moles and melanoma so that you can learn to recognize each. Important note: Telling moles and melanoma apart is not easy, even for dermatologists with years of training, so be sure to contact your doctor if you have any questions.
Final photograph below is a melanoma cancer (tumor) that is large and had gotten bigger over time -- a key characteristic of a melanoma tumor. If you see any suspicious skin lesion, especially one that is new or changed in size, contact your doctor.
Remember, melanoma can be cured if detected early, unlike many cancers. So knowing your risk factors and communicating them to your doctor may help you make more informed lifestyle and healthcare choices. If you have multiple moles or other risk factors, it is important that you perform regular self examinations of your skin, see a dermatologist for regular examinations, and protect yourself from the sun.

SKINIPEDIA, your Skin Encyclopedia