When selecting slate for engraving coasters, it’s essential to choose the right type to ensure durability and a quality finish. Generally, black slate is preferred for coasters because its dark surface provides a high contrast against the engraving, making designs more visible and appealing. Look for fine-grained slate, as it offers a smoother surface for precise engraving, allowing for intricate designs and clear text.

Another option is natural cleft slate, which has a more rustic appearance and a textured surface. This type adds character, but it may not be as easy to engrave as smoother variants. Ensure that the thickness of the slate is adequate—typically, a thickness of at least 1/4 inch is recommended for coasters to withstand daily use.

Additionally, consider sourcing slate that is treated or sealed to resist moisture and stains, enhancing longevity in a coaster application. Brands that specialize in slate products often provide options specifically designed for engraving. By selecting the right type of slate, you’ll enhance the aesthetic appeal and functionality of your engraved coasters.