Under Natural light (in most cases). We do our best to get a true representation of our stones. Sometimes there might be a little bit variations in color because of enlarging the photo, or because of different settings on individual monitors. Your complete satisfaction is always our goal! Thank you very much for your business and happy shopping!The item "6.5lb 3.8 Natural Rare Skull Agate Crystal Quartz Geode Clusters EC33" is in sale since Saturday, January 20, 2018. This item is in the category "Collectibles\Rocks, Fossils & Minerals\Crystals & Mineral Specimens\Crystals". The seller is "supercrystals" and is located in Lianyungang, Jiangsu. This item can be shipped worldwide.