Aquamarines grew with emeralds, Claire told me. But emeralds were fragile and always broke into smaller pieces, while aquamarines were stronger, grew in huge crystals without any trouble, so they weren't worth as much. It was the emerald that didn't break that was the really valuable thing.
I love blue more than any other color. I am inordinately attracted to any blue substance: to minerals like turquoise and lapis lazuli, to sapphires and aquamarines; to cobalt skies and blue-black seas; Moslem tiles - and to a blue flower whether or not it has any other merit.