Silicate Planet

Silicate Planets are the most common type of terrestrial planet, especially in our solar system. Earth, Mars, Venus and Mercury are all examples of silicate planets. Silicate planets are composed of a rocky silicon-based mantle with a metallic core, usually composed of iron, allowing silicate planets to experience tectonic activity and have a magnetic field. Silicate planets have a density of between roughly 3 to 6 g/cm3 (found around the Fe/MgSiO3 band on the Mass-Radius graph), with the densities of planets generally getting lower further out in the star system.

The most basic type of silicate planet is a Rocky Planet, which is compositionally similar to the Moon. Other special kinds of silicate planets include Garden Worlds, Desert Planets, Lava Planets and Hothouse Planets.

Worldbuilding in Practice
"Iphigenia is a small rocky planet of about 0.43 M⊕ and 0.84 R⊕, orbiting the F star Agamemnon. Orbiting at 4.6 AU, it is a frigid little world with little to recommend it, other than a relatively comfortable gravity of 0.6 g's. There are talks of terraforming the planet, but the paucity of valuable minerals on Iphigenia (especially compared to the abundance of Electra), combined with its far orbit and lack of geological activity have made it a low priority world."