Final answer:
The texture in question refers to non-foliated metamorphic rocks, which have crystals that interlock in a massive and structureless crystalline texture with no parallel alignment. Examples include quartzite and marble, which are coarse-grained and hard enough to scratch glass.
Step-by-step explanation:
The texture being described in the question is characteristic of non-foliated metamorphic rocks. In these rocks, mineral crystals grow in many directions with no discernible alignment, giving them a massive and structureless appearance.
Their crystalline texture features same-sized interlocked crystals that often result in a scaly surface when broken. They differ from foliated metamorphic rocks, which have mineral crystals aligned with each other, displaying parallel planes and a banded appearance.
Notable examples include quartzite, which often presents a coarse-grained crystalline texture, and marble which is also known for its interlocking crystals and coarse-grained texture. Both types of rock have crystals large enough to recognize the minerals and are hard enough to scratch glass.