A bijou is a mixed alcoholic drink composed of gin

Gin

Gin is a spirit which derives its predominant flavour from juniper berries . Although several different styles of gin have existed since its origins, it is broadly differentiated into two basic legal categories...

, vermouth

Vermouth

Vermouth is a fortified wine flavored with various dry ingredients. The modern versions of the beverage were first produced around the late 18th and early 19th centuries in Italy and France...

, and chartreuse

Chartreuse (liqueur)

Chartreuse is a French liqueur made by the Carthusian Monks since the 1740s. It is composed of distilled alcohol aged with 130 herbal extracts. The liqueur is named after the Monks' Grande Chartreuse monastery, located in the Chartreuse Mountains in the general region of Grenoble in France...

. Bijou means "jewel" in French. It is said to have been invented by Harry Johnson. This cocktail is called Bijou because it combines the colors of three jewels: gin for diamond, vermouth for ruby, and chartreuse for emerald. An original-style Bijou is made stirred with ice as Harry Johnson's 1900 "New and Improved Bartender Manual" states "mix well with a spoon and serve." This recipe is also one of the oldest in the manual dating back to 1890's.

Procedure

Pour everything into an ice-filled mixing glass. Stir gently for a few seconds. Strain into a cocktail glass and garnish with a lemon twist. Serve chilled.