Volcanic minerals are the minerals that crystallize from lava during volcanic eruptions or from magma immediately...

Plate tectonics is the fundamental geological theory explaining the movement of Earth's lithospheric plates and the...

Metamorphic rocks form when pre-existing igneous, sedimentary, or older metamorphic rocks are transformed by elevated...

Lapis lazuli is one of the most famous ornamental stones in human history. Revered for its intense royal-blue color...

Citrine is one of the most popular and affordable gemstone varieties of quartz. Famous for its warm yellow, golden,...

Agate is one of the most recognizable and popular ornamental gemstones in the world. Known for its beautiful banded...