Pikes Peak Batholith Colorado Amazonite Colors

I have found Amazonite now in several locations throughout the Colorado Pikes Peak Batholith.  After soaking many pieces of amazonite in acid for about 3 months to try and pull some of the iron oxide staining out of the crystals I got to wondering if finds from different locations in the Pikes Peak Batholith zone were consistent.  Regarding the iron oxide staining, I have had varied success with this winter’s cleaning; some the staining is embedded deep into the stones.

Amazonite is crystallized feldspar microcline with trace amounts of Lead (Pb) giving the green color, normally microcline is a pinkish/salmon color and up on Mt Antero is it white. There are a couple of examples of white capping and white striping (inclusion of orthoclase) shown here which I’m excited to have–the Amazonite in the Smithsonian museum is completely white capped/striped coming from the Two Point Claim–which is incidentally immediately between the Smoky Hawk and April Fools–the claims where I have gotten most of my Lake George stones. Amazonite and Smoky Quartz combos are highly sought and somewhat valuable. There are a couple of combos in the center of this picture from finds in the Lake George area.  Although I have found many smoky quartz and some Amazonite at Devils Head, only a few combos have been unearthed.  I can see why the combos are sought as they have been rare for me too.

There definitely is a different intensity of color throughout the different zones of the Pikes Peak Batholith.  You can see that the darkest (most desirable) color is from the Lake George area in Teller County, although I have found some paler color in that area, I have not found any pink microcline. The few pieces I have from the Wigwam district in Jefferson County are lighter green but have fantastic crystal formations; I have also found pink there. The Devils Head variety is more bluish and definitely paler, but many of the stones I have found have signs of the white capping/zoning in the crystals; most of the microcline at Devils Head is pink for me. I have some Amazonite from the Pine Creek area which is more green than Devils Head but still paler than Lake George.

Amazonite Colors

A comparison of amazonite color from throughout the Pikes Peak Batholith of Colorado (click for larger image)

I have not yet searched out the entire list of known locations for Amazonite throughout the Pikes Peak Batholith, so someday perhaps my color observations can be more thorough.  The following map is an arial view (courtesy Google Maps) of the areas I have searched and locations are color coded to match the above specimens.  Would love to hear your experiences, knowledge and thoughts on the topic in the comments!

Pikes Peak Batholith Amazonite location map

Pikes Peak Batholith Amazonite location map

Rockhounding Wigwam, Jefferson County Colorado

June 8, 2014.  I had the opportunity to visit a private claim with the Lake George Gem and Mineral Club in this famous Colorado locality in spring 2014.  The area and drive to the locality is beautiful; a stretch through the Hayman Fire burn area which occurred on this same date twelve years prior in 2002.

Wigwam area is in the heart of the Hayman Fire burn area.  This is 12 years later (to the day).

Wigwam area is in the heart of the Hayman Fire burn area. This is 12 years later (to the day).

Hayman burn area, June 2014.

Hayman burn area, June 2014.

The area is typical pegmatite digging; although it is several feet deep.  I ended up digging a few test holes but found no peg and only found float type material that didn’t pan out.  I started checking out natural washed tailings from previous digs and noted there was some amazonite in a certain area, so I started to dig in that general area.  After a while I started seeing stepped/parallel growth on top of quartz chunks mostly anhedral with some faces.  I tuned into where these were running finding a general seam and out popped some amazonite and quartz crystals that were really cool, in the soil no more than 8″ deep.  That seam pinched out but I came home with some really unique crystals.

The first crystal I found in this spot which prompted me to spend 5 more hours in this area!

The first crystal I found in this spot which prompted me to spend 5 more hours in this area!

Cool capped quartz with multiple growth periods, terminated on both ends.  Before the acid bath.

Cool capped quartz with multiple growth periods, terminated on both ends. Before the acid bath.

After the acid bath.

After the acid bath, about 3 inches long.

 

Awesome shaped amazonite euhedral crystal!

Awesome shaped amazonite euhedral crystal, about 4 inches wide!

My second visit was to see if I missed this seam going in any other direction.  After digging many hours I didn’t find any further remnants of the seam but in the general area there were many types of crystals–some partial amazonite crystals, some more quartz chunks with parallel type growth which in some cases grew bigger as the seam opened up slightly, and more clear quartz growths on other crystals or host rock.  I even found a fluorite crystal!  I pulled out very few euhedral crystals but there were some amazonite and milky quartz.

Awesome parallel growth crystal cluster from Wigwam locale.

Awesome parallel growth crystal cluster from Wigwam locale.

Shard of quartz with parallel growth tip.

Shard of quartz with parallel growth tip.

Awesome parallel growth where the seam opened up just a little bit allowing larger crystals to form.

Awesome parallel growth where the seam opened up just a little bit allowing larger crystals to form.

Cool clear fluorite!

Cool clear fluorite!

 

I call it "The Right Foot", awesome unique crystal!

I call it “The Right Foot” (due to it being found in the rightmost foot of my dig, among other obvious reasons), awesome unique quartz crystal!

It was fun to meet other members of the club and to visit this locality I’ve been meaning to pay a visit for years!