Final answer:
Kimberlite and Lamproite differ in geology, appearance, and diamond content, with Kimberlite being a major source of commercial diamonds and more common, while Lamproite is found in specific tectonic settings and is less abundant.
Step-by-step explanation:
The key differences between Kimberlite and Lamproite lie in their geology, appearance, and diamond content.
Kiberlites and lamproites are both rare, volcanic rocks known to carry diamonds from the Earth’s mantle to the surface. They have dissimilar mineral compositions and form in different types of geological settings. Kimberlites are typically rich in olivine and are found in stable continental areas, while Lamproites contain a high amount of phlogopite and potassium-rich minerals, appearing in zones of tectonic plate collision or subduction.
Visually, kimberlite usually has a blue-grey color and is more common than lamproite, which has a variety of colors, often brown to yellowish-brown. Importantly, while both rock types can contain diamonds, kimberlite pipes are considered the most significant source of commercial diamonds, whereas lamproite sources are much less abundant.