Discolouration is a completely natural property of classic (normal) shungite. This effect is stronger on unpolished surfaces and takes a relatively long time to wear off. Shungite with polished surfaces and precious shungite hardly discolour at all.
Shungite consists mainly of carbon and is relatively soft compared to other rocks.

Don’t make mistakes when using shungite.  Use the stone power for your own good.

Carbon is an important and necessary component of the schungite mineral.  It is assumed that carbon or its manifestation is responsible for the positive properties of shungite.  However, whether a higher proportion of carbon in the shungite mineral provides better performance and higher quality has not yet been precisely determined.

Authenticity and quality are especially important for the mineral used as a protection and healing stone.

There are many fake minerals of all kinds on the market.  Shungite is also often counterfeited yo make more profit with no effort.

We often receive calls and emails from concerned shungite users who would like to know if shungite is radioactively contaminated.

When an object has an effect on the environment, one often tries to express it in numbers to better visualize the effect and compare it to the effect of other objects.  However, in the case of shungite, it is difficult to capture the effect with measuring instruments and represent it in numbers. 

A "Bovis scale" or "frequency scale" can be used to represent the level of vital energy (Qi). 

Shungite is a mixture of many different minerals that hardened into rock more than two billion years ago.  It is clearly seen on the classical (normal) schungite surface.  When the surface is polished, it looks like it has scratches, stains, or even fingerprints on it.  It is mostly pyrite (light gray) and quartzite (golden), but other elements are also irregularly distributed in the stone.

In the photo you can see the polished surface of classical shungite.  The irregularities are completely natural and are a sign that this is real shungite.

Pyrite and quartzite are often seen as scratches.  The first

From an early age, we are used to the fact that many things in our lives have a certain structure.  We go to school in a certain grade, and our performance is graded.  We also later develop many different groups, areas, and gradations that are necessary in our lives to maintain a certain order and overview.

Shungite is very fragile and even small knocks can break it.  Sometimes all it takes is for your shungite pendant to fall onto a tiled bathroom floor for it to break into several pieces. 

How many fullerenes are present in a glass of water exposed to shungite? I have been asked these and similar questions by many people who have used shungite. My answer is this: I do not know.