HMS Turquoise was an Emerald-class composite screw corvette that served in the Victorian Royal Navy.

Launched in 1876, Turquoise was active during the War of the Pacific in 1879 and 1880, reporting the sinking of the Chilean corvette Esmeralda during the Battle of Iquique.

In 1890, the crew of the corvette joined an expeditionary force sent to Witu that successfully suppressed the slave trade in the area.

The additional longitudinal strength of the metal frames was designed to afford the opportunity to build in finer lines, and thus higher speeds.

The ships did not deliver this better performance, partly due to poor underwater design, and also were prone to oscillate in heavy weather.

[6] The ship was equipped with six cylindrical boilers feeding a compound engine consisting of two cylinders, working on low and high pressure respectively, rated at 2,000 indicated horsepower (1,500 kW).

Five were mounted to each side to provide a broadside, the remainder being fitted in pairs firing through embrasures at the ends of the ship.

[1] Laid down by Earle's Shipbuilding at their shipyard in Kingston upon Hull on 8 July 1874 alongside sister ship Ruby, Turquoise was launched on 22 April 1876 and was completed on 13 September 1876 at a cost of £95,547.

[11] The vessel observed the conflict between Chile and Peru, including reporting the sinking of the Chilean corvette Esmeralda at the Battle of Iquique on 21 May 1879.

[20] The mission was a success, led to an almost complete cessation of the slave trade in the area and caused no casualties amongst the crew.