<s>[INST] how are diamonds formed? [/INST] Diamonds are formed over millions of years deep within the Earth’s mantle over billions of years, as a result of heat and pressure from the Earth’s gravity. Diamonds originate from carbon that became trapped in the upper or lower mantle during the creation of the Earth.

I hope this helps you to understand how are diamonds formed!</s>\ <s>[INST] How are diamonds dug up? [/INST] Open pit diamond pipe mining is the most common way to mine diamonds directly from kimberlite pipes. 

Explosive blasts loosen the diamond bearing rock, and earth mover machines load the ore into huge 300-tonne trucks that take it to a diamond processing plant.</s>