Cocaine Images are abundant on the internet. We have gathered the best images of cocaine here to help you in learning about this dangerous, illegal drug. Cocaine is usually seen in pressed rock form or powdered form. When in powder form, it has a chalky like texture. In pressed rock form, cocaine is delicate and sometimes shiny in appearance. Cocaine's color in either form is white or light yellow. Cocaine works by stimulating your Central Nervous System within the brain to release dopamine and not allow it to be absorbed back up. This causes extended feelings of euphoria and pleasure while high. However, your body will build up a tolerance from cocaine and more of the drug will be needed to recreate these feelings. Eventually, these effects will not be attainable from using cocaine and can cause difficulty in having feelings of pleasure or happiness.