Archaeologists have discovered ancient houses as well as precious artifacts and jewels from a buried kingdom, beneath the volcanic ash in Indonesia. The excavated remains were found on the Indonesian island of Sumbawa near the foot of the Tambora volcano known for its largest eruption in recorded history. “Based on the unearthed remains, particularly the many bronze objects and jewels, evidence... 

Recently, scientists from Bristol University (UK) and the Carnegie Institution (USA) found that virtually the entire globe is involved in the “production” of diamonds, except, perhaps, the nucleus. In a Brazilian mine minerals were discovered that appear to have formed at the depths of 400-660 kilometers from the surface of our planet.
 Even those who never touched a diamond know that...