Which term refers to a diamond that forms in the continental crust near the earth's surface due to meteorite impact or tectonic plate collision?

• A. Crustal Diamond
• B. Carbonado
• C. Eruption
• D. CLIPPIR Diamonds

Answer: (A)

Crustal diamonds are those that form in the continental crust near the Earth's surface under high-pressure conditions produced by events like meteorite impacts or tectonic plate collisions. This shallow-crust formation pathway contrasts with diamonds that originate deeper in the mantle and are carried to the surface by volcanic eruptions (kimberlite/lamproite activity). Carbonado refers to a separate, black polycrystalline diamond with a debated origin, not the shallow crustal formation described. CLIPPIR diamonds are a distinct category tied to different growth histories and environments, not the near-surface crustal formation produced by impact or collision.