A cross-section of agate. Multicolored silica bands colored with metal oxides are visible. Origin: Rudno near Krakow, Poland.
Palabras clave
agate,
stone,
semi-precious,
mineral,
geology,
ornament,
pattern,
krakau,
cross section,
cut,
specimen,
colours,
nature,
quartz,
silica,
metal,
stalactite,
black,
background,
geode