I own Selenite (wand), Amethyst (natural and tumbled), Black Tourmaline (natural and tumbled), Black Obsidian (tumbled), Lepidolite (tumbled), Clear Quartz (natural and tumbled), Rose Quartz (natural and tumbled), Tiger's Eye (tumbled), Peridot (natural and tumbled), Bloodstone (tumbled), Sodalite (tumbled), Hematite (tumbled), Lapis Lazuli (pendant), Red Jasper (tumbled), Chiastolite (tumbled), Angelite (natural), Ametrine (Tumbled) and a Citrine point (natural). Other crystals I cannot remember.
I also don't have a favourite one, I like most of them.