Shatter, with its flawless amber glass transparency, has a reputation for being the purest and cleanest type of extract. The consistency and texture of oil comes down to different factors entirely.
The reason shatter comes out perfectly clear has to do with the molecules which, if left undisturbed, form a glass-like appearance. Heat, moisture, and high terpene contents can also affect the texture, turning oils into a runnier substance that resembles sap (hence the commonly used nickname “sap”). Oils with a consistency that falls somewhere between glassy shatter and viscous sap is often referred to as “pull-and-snap.”