This is a large crystal resin copper energy art pyramid! It is such a beautiful piece! Great size for an altar. This resin crystal energy pyramid was made with Botwswana agates, clear quartz, sunstone, ocean agate, ammonite, tiger eye, selenite, red jasper, fossil shark teeth, steel, brass, zinc and copper. It measures 3-1/2" x 3-3/8" x 2-1/4". The basic and simplified theory of how the crystal resin art devices work is that the negative energy is attracted into the device by the organic component and then it gets bounced back and forth between the resin and suspended metal particles. Crystalline structures within the mix cause the energy to get organized and re-radiated as a positive, clean energy. They are very beneficial to our well-being. From a more personal note, being a highly intuitive, psychic person, I am always amazed to see how crystal resin help expand, clear and activate a person's auric field and chakras when they hold one!