I love all kinds of crystal, and my real name means a kind of gemstone
However, I love
CLEAR QUARTZ the most, for its unique color of transparency that none can compare with. Transparency is the best color to me. Clear quartz is pure, yet gorgeous and brings a lot of positive energy.
Diamond is my 2nd favourite crystal, as it is a symbol of high-ranking and luxury. "Diamonds are a Girl's Best Friend", said Marilyn Monroe

But it's too expensive that it can be on my wishlist only T____T
I also use
amethyst and
rose quartz for my tarot decks.