My brother and I are really into crystals at the momement. I just visited the Natural History Museum in Manhattan and they have some insane crystals there.
Look at Gretchen Jones site and Fuck Yeah Crystals
Some of these crystals are out of this world!I recently came across this store in LA Otherwild that stocks the rings of artist/jeweler Adina Mills Design House.She makes these solid raw cut crystal rings that are really great.
Below is something I found at the Museum of Natural History I visited it for the first time with my Nephew and Niece - Astonishing what they have in their collection!
From Museum of Natural History NYC