Pb2Cl3(OH) / Hexagonal - Trigonal Dipyramidal (very rare structure)
This crystal just blows open the whole energetic system and has the highest frequencies of all crystals. It will lift your energetic frequency to the highest levels possible and it is also very powerful in doing so, so be ready for a shift when you get one. But be careful cleaning it as it will dissolve in water.
When I started collecting crystals I knew there were special high frequency crystals such as phenacite, scolecite, petalite, Rhodizite, Danburite and brookite that were able to reach the higher chakras above the crown but they were always starting in the energetic / physical body and going up from there. But Penfieldite is the ONLY crystal that I have tested out of the 5000 unique crystal specimens that actually start way above the crown chakra and reaches the highest levels that no other crystal can reach.
It is one of the few crystals that clearly shows the amplituhedron structure in it, that would explain why this crystal is to powerful and high in frequency.
Now you really have to tune into the small crystals and not just the whole matrix to feel how powerful they are. The blue PseudoBoleite crystals that are sometimes found together with Penfieldite pull these extremely high frequencies into the body.
Many of these crystals belong or belonged to a private collection of Terry Szenics, who was the claim owner for the Margarita Mine in Chile where the best samples of this species were found in the early 1990s by him and his team. The second best location is east of Athens, Greece - (east Attica, Lavrion district) and the third best location is west Pisa, Italy (Piombino).
I bought these cluster above from Terry but I do not sell any of them. So you can ask him or find your way on the internet to buy one. They do not come cheap... But man are they worth it.