Crystal houses symbolise the wisdom of the earth (the crystal) being surrounded by the knowledge of the sea (the shell). On a practical level the shell amplifies the positive energy of the crystals. They are bound together by the ancient alchemic mix of silver, tin and aluminium considered sacred in Aztec times.
Spiritual Art has been used throughout the ages, by all cultures. While each piece is a work of art that is beautiful on display, they are important spiritual tools which can be used for healing, mediation and loving ritual.
Ultimately what they mean and what they are used for is up to you. Each piece has been created with the intention of bringing more love and light into the world. They truly are divine!