角银矿（英文：Chlorargyrite 或 Cerargyrite）是矿物形式的氯化银（AgCl），是氧化银矿床的次生矿物相。可被开采并提炼成白银。其晶体等距-属立方晶系中的六八面体（hexoctahedral）晶类，常以柱状立方晶体形式出现。质地较柔软，硬度为摩氏硬度1〜2级之间，密度与比重为5.55。角银矿不溶于水。

角银矿颜色多变，刚开采的矿石，由几近无色的淡黄色至浅绿色都有。由于它的主要成份是氯化银，而氯化银是一种对光敏感的物质，照光后会分解成银及氯。故角银矿矿石暴露于强光之下，会变为褐色或紫色。

Chlorargyrite is the mineral form of silver chloride (AgCl). Chlorargyrite occurs as a secondary mineral phase in the oxidation of silver mineral deposits. It crystallizes in the isometric - hexoctahedral crystal class. Typically massive to columnar in occurrence it also has been found as colorless to variably yellow cubic crystals. The color changes to brown or purple on exposure to light. It is quite soft with a Mohs hardness of 1 to 2 and dense with a specific gravity of 5.55. It is also known as cerargyrite and, when weathered by desert air, as horn silver. Bromian chlorargyrite (or embolite) is also common. Chlorargyrite is water-insoluble.