The following was published on Sincerely Silver. 

In general, the bar necklace is simple and understated but is definitely chic enough to stand out against all the other wild styles of necklaces. The custom bar necklace can come in many styles (typically horizontal or vertical), many materials (usually gold, rose gold or silver) and can be as extravagant or as simple as you like. Hollywood elites, like Emma Watson and Jennifer Lawrence have been seen wearing this simple, custom bar necklace. Bar necklaces are a hot trend mainly because they are super minimalist, and can therefore be paired with all different kinds of necklaces and jewelry. Emulate hollywood fashion with this classy necklace, or personalize your wardrobe with a custom bar necklace designed with you in mind.

A bar necklace usually refers to a simple necklace with a horizontal bar, attached on either side with a matching chain, either silver or gold.

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