David Englund Photography

 > Close-up of the Brazilian's quartz and pyrite cavity.
 > Another Brazilian agate; 19cm x 11.7cm x 4.4cm. 

Very colorful and it would seem the rock's natural colors as none are predominant. That's usually the first sign of a dyed or baked rock.

By the way, this rock is not face-polished. I have a slice of this same rock that was polished. It's quite unusual to get both a slice and the original rock it came from.
 > Close-up of the Brazilian. Again, a quartz and pyrite filled cavity, accented by some beautiful yellow and red banding.
 > A beautiful blue Brazilian agate; 14.5cm x 10cm x 7.7cm. 

Many Brazilian's are artificially dyed or oven-baked to intensify their colors. Seeing that the quartz and pyrite cavity is still very white, it would seem to indicate the blue is the natural color of the rock
Close-up of the Brazilian's quartz and pyrite cavity.
 > Close-up of the Brazilian's quartz and pyrite cavity.
Close-up of the Brazilian's quartz and pyrite cavity.
Photo by: Dave Englund · see photo in gallery

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