"Mineral veil" is not a commonly used term in the context of geology or mineralogy. It's possible that you are referring to a specific product or concept related to:

1. Cosmetics:

* Mineral veil powder: This is a common term in the beauty industry, referring to a type of face powder that is made with finely milled minerals like mica, silica, or talc. These powders are often used as a finishing touch to makeup, providing a smooth, matte finish and blurring imperfections.

2. Geology:

* Veil: In a geological context, "veil" can sometimes refer to a thin, almost transparent layer of rock or sediment. However, "mineral veil" wouldn't be a standard geological term.

3. Other:

* Metaphorical: "Mineral veil" could be used metaphorically to describe something that appears delicate or fragile, like a thin layer of minerals.

To provide a more accurate answer, please provide more context or details about where you encountered the term "mineral veil."