What is one type of rock that is NOT made from minerals? a basalt b coal c jade d granite

While most rocks are composed of minerals, coal is a fascinating exception! This sedimentary rock is formed from the accumulation and compaction of organic matter, primarily plant material, over millions of years. It’s a reminder of how life once thrived in ancient swamps and forests! When exploring geology, it's easy to overlook the unique nature of coal. Unlike most rocks that are composed of distinct mineral crystals, coal's organic composition makes it essential not just as a rock but as a significant energy resource, utilized worldwide for electricity and heat. Always remember, geology has its surprises waiting in the layers!