Lithium is a mineral used in meds for mood changes. Grey lithium is form of lithium quartz - a silvery grey. Powerful, but gentle. Calms and balances emotions. So, this one is great to keep near you for insomnia, general calm and assistance feeling a little better when you're feeling down. Usually Lithium shows up as a pink color, but these are a grey form of this mineral that isn't very common.
The crystals in the photos are representative of this collection and are not always the exact crystal you are buying since they are shown in full view on videos on Instagram.
These are natural crystals and have flaws and imperfections as part of the growing and mining process. All qualities outlined in the Instagram video represent the crystal you are choosing.