The most common mineral found on the surface of the Earth is feldspar.

Here's why:

* Abundance: Feldspar makes up about 60% of the Earth's crust, making it the most abundant mineral.

* Variety: Feldspar is actually a group of minerals, including orthoclase, albite, and plagioclase. These various feldspars are found in many different types of rocks, from granite to basalt.

While other minerals like quartz are also very common, feldspar takes the top spot in terms of overall surface abundance.