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Zincite is a rare and valuable mineral composed primarily of zinc oxide (ZnO) with traces of other elements such as manganese, iron, or cobalt. It crystallizes in the hexagonal system and typically forms as prismatic, acicular, or fibrous crystals, often exhibiting a bright red to orange-red color due to impurities. The name "zincite" originates from the element zinc, which it contains, and was first described in 1832 from specimens found in Franklin, New Jersey, USA.

Zincite is notable for its striking color and transparency, which can range from transparent to translucent. It is often found in association with other zinc minerals like smithsonite, hemimorphite, and willemite, as well as with calcite and barite. The mineral is relatively soft, with a Mohs hardness of 4.5 to 5.5, making it susceptible to scratching.

Due to its rarity and aesthetic appeal, zincite is sometimes used as a gemstone in jewelry, though its hardness and fragility limit its practicality for heavy wear. It is also collected by mineralogists and enthusiasts for its unique appearance and historical significance. Zincite deposits are found in a few locations worldwide, including the type locality in Franklin, as well as in China, Mexico, and Namibia.

In addition to its ornamental uses, zincite has industrial applications. Zinc oxide, the primary component of zincite, is widely used in pigments, ceramics, rubber, and pharmaceuticals. Synthetic zinc oxide is more commonly utilized in these industries due to its abundance and consistency, whereas natural zincite remains prized for its rarity and mineralogical interest.