It is a lazulite (blue porphyroblasts of Mg-Al phosphate) aploid (see shearing of mica). These mobilizates come into existence during wall rock reactions with Al-enriched metapelites and in the course of an introduction of P via pegmatitic or aplitic mobilizates.

DILL, H.G., SKODA, R., WEBER, B., BERNER, Z., MÜLLER, A. and BAKKER, R.J. (2012) A newly-discovered swarm of shearzone-hosted Bi-As-Fe-Mg-P aplites and pegmatites in the Hagendorf-Pleystein Pegmatite Province, SE Germany:  A step closer to the metamorphic root of pegmatites. Canadian Mineralogist, Special Volume dedicated to Petr Černý, 50: 943-947.

HGD

We present the results of magnetic properties and entanglement of the distorted diamond chain model for azurite using pure quantum exchange interactions. The magnetic properties and concurrence as a measure of pairwise thermal entanglement have been studied by means of variational mean-field like treatment based on Gibbs-Bogoliubov inequality. Such a system can be considered as an approximation of the natural material azurite, Cu3(CO3)2(OH)2. For values of exchange parameters, which are taken from experimental results, we study the thermodynamic properties, such as azurite specific heat and magnetic susceptibility. We also have studied the thermal entanglement properties and magnetization plateau of the distorted diamond chain model for azurite.

Azurite and malachite have not been spotted by the unarmed eye.

Lazulite [MgAl2(PO4)2(OH)2] forms a s.s.s. with scorzalite as bivalent Fe substitutes for bivalent Mg in the XX. It can take on blueish and greenish tints which might be confounded for supergene Cu minerals. Despite of that there also exists a Cu-bearing s.s.s. which is rather rare hentschelite [CuFe2(PO4)2(OH)2] and I would rule for geological and petrologicaal reasons based upon the current database.

HGD

Thank you very much

These rocks are igneous. No evidence of Lazulite [MgAl2(PO4)2(OH)2] .These rocks have unique style of Azurite and Malachite and mineralization.Please see SEM peaks below. Now I am confused what type of mineralization occurred in these rocks .

To create malachite in granite is not a problem but to create azurite the P CO2 is not enough. Why do you suspect of a different mineral as you have already conducted SEM scans ? Did you expect covellite or a stained quartz modification (jasper, chalcedony...) which is masked in the scan by the rock-forming silica/ quartz that is ubiquitous ?

HGD

I don't suspect both minerals in these rocks. I just want to know what type of mineralization style does these rocks indicates.

This is the famous K2 rock, a granite that indeed contains spectacular azurite spots and also malachite. Since you have it, why not study it? - the answer is more likely in the rock itself than on the net, and also petrology is by far more than a diffractogram and a sample image. To start with, a couple of thin sections would help pretty much.

Even an old dog can learn new tricks

HGD

Harald G. Dill you tell me about? The answer would be hypogene, but that's less interesting than figuring out how and why.

Gavril Săbău I have started detail work. I'm only bit confused in type of mineralization. According to my observations its seems me hypogene type but its some aspects are similar to supergene. Is possible transition between both hypogene to supergene state?

What is essential is the PCO2 which should be very high for azurite, in particular, as being compared to malachite. The latter can form simply under near ambient conditions in every climate zone. For malachite I would suggest supergene conditions. Since I do not know anything about this granite excluding the image given it would be rather difficult for me to constrain for azurite the physical-chemical regime.

HGD

The spots are oblate nodules in the otherwise pristine rock, which is a peraluminous, slightly oriented, mostly fine-grained leucogranite. Malachite is more dispersed, but it may also form nodules. The lack of any conspicuous alteration of the rock pleads against supergene formation, as does the the flattening and concentration of the nodules coinciding with the orientation of the granite. The inner structure of the nodules and identification of a potential precursor (if any, or alternatively, evidence for forming because of sluggish nucleation) would help. Indeed azurite formation requires high CO2 activity, also making supergene conditions less likely.

Dear Amjad,

Thanks for asking a nice question and reading the response from many experts.

I agree with Prof. Harald G. Dill 's response that supergene conditions might be likely to form the azurite as compared with the hypogene. I also somehow agree with Prof. Gavril Săbău s explanation that lack of alteration that is against its supergene formation.

I have looked on exactly the same rocks (the second type: quartz-feldspar rich type), and to me it seems supergene condition might be more plausible to form the Cu-mineralization. I share a hand sample and cut chips with polished surfaces. Indeed, some portions show the rounded blue spots on the polished surface but most of the other surfaces have less prominent nodular type features. That possibly suggest a later stage development as I guess. Some one expert in ore mineralogy may give further feed back regarding this mineralization process.

very interesting read and conversation between all contributors. However, i think that beyond the specimen/sample, the field relationship and the associated rocks my further strengthen the various assumptions and should not be left out during modeling of the possible mineralization type.

It is worth considering. Thankful

Dear Amjad,

In site

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K2 STONE

Discovered recently, K2 is an eclectic and odd looking stone. It is a form of Granite Gneiss however contains spherical, bright blue spots riddled all over. Named after the rock formation it is exclusively found on, the K2 mountains of Pakistan- an extremely remote area of the world. K2 is also known as “Blue Berry Jasper”. Most likely due to weathering and erosion brought on by glaciers that carved the K2 mountains, a now “erased” layer of copper-carbonate rich stratigraphic layer only left its mark by staining the Granite below it, and that is the Azurite and sometimes Malachite occurrence. K2 is a great stone for any rock lover and is definitely a one-of-a-kind piece of mysterious geologic history!

METAPHYSICAL PROPERTIES

K2 is a great stone to practice spirituality. As it is a rock, not a mineral, it contains many components that give it an edge when comparing it to other crystals. It has the properties of grounding with iron-rich minerals, the clairvoyance and focus of Quartz, the gentle healing vibes of Feldspar along with the divination and receptivity of Azurite! Azurite is perhaps the best stone for chasing run-off thought processes, and is used in physical healing.