Which Rocks term is correctly associated with formation process: “formed mainly by metamorphism of limestone”, and also with “has interlocking calcite crystals”?

Correct Answer: Option B — Marble. Marble is correct because it is formed mainly by metamorphism of limestone. Marble is also associated with has interlocking calcite crystals. A further identifying fact is that Marble is has interlocking calcite crystals. Another useful fact is that Marble is associated with used in sculpture and architecture. Why the other options are incorrect: Option A — Slate: It is formed mainly from shale under pressure and heat and is associated with splits into smooth thin sheets; those are the identifying facts of Slate. Option C — Quartzite: It is formed from sandstone rich in quartz and is associated with very resistant to weathering; those are the identifying facts of Quartzite. Option D — Granite: It is formed by slow cooling of magma below the surface and is associated with coarse-grained with visible crystals; those are the identifying facts of Granite. Exam Takeaway: Link Marble with “formed mainly by metamorphism of limestone” and “has interlocking calcite crystals” for quick revision.