Hemimorphite is a zinc silicate mineral with a chemical composition of Zn4Si2O7(OH)2*H2O. It contains up to 54% zinc by weight and is a minor ore of zinc. Hemimorphite is a common secondary mineral found in the weathered rocks above and around zinc deposits.
Most hemimorphite is white, gray, colorless, or brown. Rare specimens with nice crystals and spectacular yellow, bluish green, or bright blue colors are popular with mineral collectors. It is also cut into cabochons and beads for gemstone collectors and jewelry.
