Never seen a purple, bright red, or green dendrite. If you have, please let us know.
While the background rock with a dendrite is one color, the dendrite itself is always a different color. (would be really hard to see it if the dendrite and the background were the same color, right?)
There are stunning museum quality dendrites with only one color dendrite (as you would see in a black and white drawing or photo).
And there are amazing rocks with several colors, and repeating patterns of the colors as well.
