A new study has shown that as early as the Stone Age, people in Africa traveled long distances to procure colorful stone, the ...

Learn more about the colorful and shiny stones that were turned into tools as many as 40,000 years ago, which were sometimes ...

New research reveals Stone Age foragers in Africa traveled miles to collect colorful stones, showing early trade, taste, and ...

The geochemistry of agate and chalcedony in volcanic rocks represents an intricate record of silica precipitation and crystallisation processes occurring under variable thermal and chemical ...