Ok So here are the plum colored eggs from the Silver Blue Double Laced Barnie Project Birds.
1. Four of the eggs "WET" and a single sussex egg for comparison in the center.
2. Same eggs a while later when half dried.
3. Same eggs when dried. They look the color of wild plums.
The last dark spots on the eggs in 3. vanish when eggs are completely dry.
If you look really closely at them in your hand you can see a rough deposit on the surface. When the eggs are wet the water changes the reflective properties of the surface and the underlying color shows through. This egg finish is not normal for Barnevelders, since the breed (and all of my Gold Double Laced Barnevelders) has nice shiny surface eggs. But I thought it was sort of interesting and I had not seen it in my pure Barnie lines.
The Croad Langshan are known to lay eggs this color, and I have seen pictures of them, but I don't know if they are similar in having the rough micro-surface. Perhaps this is a throwback to the Langshan ancestry that is in the Barnevelder family tree.
I see this pink bloom on my Barnie eggs quite often.