This is a specialist from of double terminated quartz called Tibetan Quartz Crystal Point or more accurately Sichuan Quartz given the location of being found. Some have enough clarity that you can see inside.
Some have so much inclusions that they are black quartz. I believe the black inclusions are carbon (or manganese inclusions which raise its vibration. Some minor nicks as all natural crystals have. Some have extra interesting formations like barnacles, soul mate and apertures.
Read here about double terminator configuration.
Tibetan quartz points help cleanse and open all chakras to help energy flow around the bodies. And this helps focus, clarity of thought and concentration. Sichuan or Tibetans do this even more powerfully with their higher vibration. They are great for shamanic work. I find that those customers who are about to go on a new burst of spiritual growth or they have just started that cycle are called to get these. Read more on Healing tab.
You can read more about the shape if you click here.
Dimensions are for Group 2-B.
To help you pick your crystal I created this video (click here) of all of them. If you just want to buy cheaper and with discounts for gridding – look at this – click here.
Each double terminated quartz or rather Tibetan quartz crystal point looks even better in person.