Placer Gold is the most common form and has been eroded by rivers, floods, glaciers and other natural erosive processes. But crystallized Gold is Gold in its most natural state before being exposed to weather and eroded by other natural elements.
This crystalized gold is from Pontes e Lacerda, Mato Grosso, Brazil. It is basically an altered cubic structure that was left to form freely in weathered, crumbly rocks and sandy soil and to form unaltered by the natural elements.
In 2015 there was great political turmoil in Brazil caused by relaxation of authority resulting in open access to Gold bearing areas. A large number of adventurers, experienced miners and people of all types rushed to that area. After only two months mining was bogged down by Brazilian laws and complicated mining rights. Since 2017 there has been very little new crystalized Gold taken out since police prohibit access to this area.