We receive our products from Russia, republic of Karelia.
We have our own production there. And all shungite we have is from the best mines - Zajzogincky mines.
You can make tests with electricity conductivity, test with PH of shungite water - they will be ok!
Here is our youtube channel with tests and properties of shungite stone: https://www.youtube.com/channel/UCXIbRBNbcka7JuJ6n-Tp88g We will be very appreciated to receive your comments about perconal experience with shungite stone.
There are three types of shungite:
Type 1 - regular shungite 35-45% carbon content. All pyramids, balls, cubes, beads and chips for water purification are made from this type of shungite. Shungite is a soft stone and can leave black marks; this feature confirms the authenticity of the stone. Polished products must not be wiped with a damp cloth or washed. Wipe with a dry cloth. Unpolished you can rinse to wash off dust from them.
Type 2 - Petrovsky Shungite. It contains 65% -75% carbon. It is used to purify water and jewelry. But this stone is more expensive and also fragile.
Type 3 - ELITE shungite is a very fragile stone-crystal with a carbon content of 95-98%. BEWARE! Elite shungite is not possible to be subjected to any treatment - it is a fragile stone that does not hold its shape. The structure is such that it does not make beads, pyramids and other products. It can be purchased as it is.