What describes the medium texture category of jadeite?

The medium texture category of jadeite refers to the appearance and quality of the stone in terms of its grain size and overall texture. This category indicates a balance between fine and coarse textures, resulting in a stone that exhibits a certain level of smoothness and luster.

Referring to the context of jadeite mining, a relatively old mine is associated with the medium texture category because older mines tend to produce stones that have undergone longer geological processes, resulting in more varied grain sizes. Over time, the mining of jadeite will yield stones that are characterized more by their consistent medium textures, compared to newer mines which might not have had the time to produce a wide range of textures.

The other options do not accurately define the medium texture category, as they pertain to newer or older mines or to specific texture types that either fall into finer or coarser classifications, which do not encapsulate the nature of medium texture jadeite. The medium texture's association with older mines underscores the geological history and quality that comes from established sources of jadeite.