I have my favorites of course. Quartz are always great, love the clusters for just placing around my house or gifting to others. I use quartz crystals in my Reiki Grids, for mediation and sometimes when I am giving Reiki sessions to amp up the energy. Quartz always remind me of Superman's Fortress of Solitude. Lamarian's learned to use quartz for its power conducting abilities, it was a major part of their spiritual based society. Some people believe the mystery of the Bermuda Triangle is caused by a giant quartz generator left buried deep. Quartz has a way of showing up in many, many places for many uses and just like the stone itself which to me can appear kinda dull until you look closely then there is all kinds of wonder inside.
Lapis Lazuli is one I wear often. I have a beautiful heart necklace stone that helps with my throat chakra open up, your throat chakra is all about communication and expression. Many people have trouble with the throat chakra as past lives often have choking, beheading, and/or hanging.
Moldavite is fascinating. Its a forest green rock formed millions of years ago when a meteor hit southern Germany, its a somewhat rare 'space' rock found only in Moldau Valley of the Czech Republic. It is known for its transformational powers. I often get this stone mixed up with Malachite, a stone also good for transformation and a little easier to find in my experience. I also love the look of Malachite, it reminds me of marble but with mystic and less polish. Moldavite is more glass like to me. I wear Malachite a lot, its a beautiful stone that heals and purifies the chakras, especially the heart. It is about letting the past go and moving forward towards change, abundance and passion.
Amethyst is always beautiful, a very popular stone most people are aware of. It is a variation of quartz known for increasing spiritual awareness, protect against psychic attack and release mental stress. It works in the emotional, mental and spiritual fields to promote calm, balance and peace. Excellent for meditation and channeling with your higher self, guides and beings of light.
Citrine is an absolute favorite of mine, not the first stone I think of when I want something pretty but I am always drawn towards it. I have a few around my home because the stone spokes to me. It is similar to the quartz but connected to the third chakra so it connects its energy with the physical body more than quartz. It is often used in Grids for abundance and achieving goals, great for empowering affirmations. It increases your self respect and encourages your soul expression, harmonizing your physical self with your spiritual awareness.
These are my top favorites, there are definitely more but I will write about them another day as right now I'm tired. Even though the Canadian Government has legalized pot I encourage you to Go get Stoned with Rocks instead. hahahahaha.