Crystal your opinion need

I like me piece of Preseli Blue Stone. It is good for past life regression.

I love selenite. Simple and potent. Selenite is said to be a powerful crystal of psychic communication. It will aid in interaction with the wise ancestors, angles and spirit guides as well as loved ones. It is said to do this telepathically and through divination, with the cosmic records fo wisdom. It is therefore a stone that should be used by mediums and clairvoyants.

Translucent Selenite has a very fine vibration and shall bring clarity of mind, opening the crown and higher chakras while accessing angelic consciousness and higher guidance. Pure Selenite is a link to the light body, helping to anchor it in the earth vibration.

Sidenote: Do not get Selenite wet. Found out the hard way that running water over selenite will cause it to crack and break.

Serpentine, bloodstone, carnelian, and various forms of quartz are really lovely. Lepidolite is also.

I love Rose Quartz, Diamond as it is my birth stone, Lapis Lazuli, and I do not know if this counts, but I love the stone Galena. You however should study up on gems and crystals more before buying some because it looks like to me you don't know much about them. When you learn more about them, you get to see which ones you would actually use based on your magickal workings.