FMF - Friends of Minerals Forum, discussion and message board

[Forrestblyth]

One of my favorite locations and one of the best in the world for Campylite

[Forrestblyth]

Many other typical minerals of the ore field can be found associated with campylite

[Forrestblyth]

This particular warm red coloration and barrel shaped crystal structure is very typical of the best specimens of this location. There are however may lime green specimens as would be normal in the Mimetite and Pyromorphite of which essentially are of all the same mineral but with additional elements that alter coloration and crystal form. A true Dry Gill campylite at its best are significantly red biased and armadillo or barrel-shaped rather than the hexagonal Mimetite habit.

[Forrestblyth]

My favourite reddish hue and melon-shaped formation.

[Forrestblyth]

Both colors for are typical of this location.

This demonstrates the great variation in coloration of a particular mineral even from the same locality. I think the redness hue increases with increased arsenic concentration. I see the same thing with my Pyromorphite collection.

[Forrestblyth]

I forgot until corrected that campylite is a variety of Mimetite. Another interesting fact is that chemically Mimetite is virtually the same as Pyromorphite. In fact, Mimetite is named so because it mimics Pyromorphite. I read somewhere it often takes chemical analysis to effectively differentiate between the lot of them. Lol

[Michael Shaw]

[Forrestblyth]