Blue Melting promotes spiritual awakening, serenity, tranquillity clarity and communication. Blue Crystals exhibit the coolest color. Blue is the color of the sky and of the ocean, after all. It's also the color of sleep and the color of twilight. It's the color of sincerity, inspiration, and spirituality. ... This makes it a wonderful color for different stones and crystals. Promotes spiritual awakening, serenity and tranquillity. Using blue stones, especially when you are under stress, is said to surround you with calming, soothing energies to relieve stress and calm the mind.