The physical properties of high-purity drugs vary depending on the type of drug. Here are some common high-purity drugs and their physical properties: ### Heroin - **Appearance** - Generally a white or light yellow powder. High-purity heroin may be more delicate and uniform in appearance, without obvious impurities. - **Texture** - It feels delicate and smooth to the touch, similar to fine flour. ### Cocaine - **Appearance** - Pure cocaine is a white crystalline powder, and the crystals usually present a regular shape. - **Texture** - The texture is relatively hard and has a certain degree of brittleness, not as smooth as heroin. ### Methamphetamine (ice) - **Appearance** - Commonly seen as colorless and transparent crystals, similar to ice, so it is commonly known as "ice". High-purity ice crystals are relatively pure and transparent. - **Texture** - It feels hard to the touch, somewhat similar to ordinary salt grains or small ice crystals. ### Ecstasy - **Appearance** - Mostly tablets of various colors, shapes and patterns. For example, some are round, diamond or triangular, and may be printed with various patterns, letters or marks. Common colors include white, pink, blue, etc. - **Texture** - The texture is hard, similar to ordinary tablets, but relatively brittle.