Which type of minerals are indicators found in kimberlite and lamproite?

The presence of tiny diamonds as indicators in kimberlite and lamproite is crucial for exploration and understanding of these mineral deposits. Kimberlite and lamproite are types of volcanic rocks that originate from deep within the Earth’s mantle. When these rocks erupt, they can carry crystals and minerals from such depths to the surface, including diamonds, which can be formed under high-pressure conditions.

Tiny diamonds serve as direct evidence of the geological processes occurring deep within the Earth and are formed in conditions where carbon is subjected to extreme temperature and pressure. The occurrence of these diamonds in kimberlite and lamproite not only signifies potential diamond deposits but also provides valuable information about the source of the magma that formed these rocks. As indicators, they help geologists identify areas that are likely to contain economically viable diamond deposits, thereby guiding exploration and mining efforts.

In contrast, other options such as quartz, ruby fragments, and gold specks may also be found in various geological settings but are not specific indicators of diamond presence within these particular rock types. Their roles and formation processes differ significantly from those of tiny diamonds, making the latter the correct choice in this context.