I don't have reasons, beyond that I feel a strong attraction:
lapis lazuli - there I think it is depth of colour.
ceylon blue sapphire - a hummm, a blue theme??
chalcedony - the untreated pale mauve variety
malachite - I feel a strong attraction that. I have a necklace and it literally makes me feel secure when I wear it, almost blessed.
crystal (clear) quartz.
rose quartz
citrine