Which type of rough gemstone is typically faceted?

The correct answer is transparent. This type of rough gemstone is typically faceted because faceting is a method used to enhance the visual appearance of a gemstone by increasing its brilliance and sparkle. Transparent gemstones allow light to pass through them effectively, making them ideal candidates for faceting.

Faceting involves cutting precise angles into the surface of a stone, which creates a series of flat surfaces, or facets, that reflect light in a way that highlights the stone's clarity and color. This technique is most effective with materials that are transparent, as the light can enter the gem, reflect off internal surfaces, and exit, often resulting in a dazzling display of brilliance.

In contrast, opaque gemstones do not allow light to penetrate, which hinders the goal of faceting to enhance light performance. Translucent stones allow some light to pass through, but not enough to create the brilliant effects associated with faceting. Coarse is not a description of transparency or translucency and does not pertain to the light performance and aesthetics that faceted stones aim for. Thus, transparency in gemstones is the key characteristic that makes them suitable for faceting.