FITTG Material: natural crystal cluster, rough and raw. shape: irreguar, freeform. Size Details(approx): Length: 3.2-5.5 inch Weights about 150-600 gram Due to the crystals are , the crack or chipped will be normal,the sizes and colors of them are different with each other, we will send what we have by random. Clusters are wonderful for crystal grids,massage,reiki,display,protection,fengshui,home decor,collection,curios cabinet, wirework,absorb negative ,changing bad vibrations,expanding the mind.Crystal Collection and Gifts: If you or your friends like to enjoy collecting natural gems and minerals, this natural crystal cluster geode is a good quality specimen to your collection. Use for: ,massage,reiki,display,protection,fengshui,absorb negative ,changing bad vibrations,expanding the mind. Size Details(approx): Length: 3.2-5.5 inch Weights about 150-600 gram. Since each stone specimen is a natural crystals, expect some slight variation in terms of size, color, texture and shape, etc. Quartz Stone: The Bismuth ore Quartz Geode has an eye-catching, iridescent cut edge and a shimmering quartz crystal interior. Promote flow around you and fill it with . Natural Rock Crystal Stone: Natural Bismuth ore crystal geode stone is a form of natural rock crystal to create a wonderful crystal cluster to show its natural beauty with a beautiful array of colors. It will look shinning when you place it under the sun or well-light area.