A cross-section of agate. Filled with quartz. In the center silica ring coloured by metal oxides and geode.
Schlüsselwörter
agate,
stone,
semi-precious,
mineral,
geology,
ornament,
pattern,
surface,
cut,
morocco,
atlas,
cross section,
specimen,
colours,
nature,
quartz,
silica,
metal,
stalactite,
black,
background,
geode
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