Stone Length (with base) : 29 cm / 11.41 inches. Stone Width (with base) : 13 cm / 5.11 inches. Stone Height (with base) : 8.5 cm / 3.34 inches. Stone weight (with base) : 1822 g / 4.01 lb. Stone surface process: Unpolished. Wood base are included. Petrified wood fossil jade is jade petrified wood, it belongs to petrified wood, but it also differs from normal petrified wood because of its crystal clear appearance. In long geologic history, large areas of primeval forest been buried underground, and soak in silica at high pressure, low temperature and under the anaerobic environment, the carbon in tree been replaced by silica gradually, but keep part of the natural wood character, and absorb other mineral elements around, and becomes to the colorful petrified wood. Then after long geological time, as the temperature and pressure keep change, petrified wood has metamorphism and recrystallized, main ingredients changed to chalcedony, this is petrified wood fossil jade. The formation of petrified wood fossil jade needs extremely harsh geological environmental conditions, The probability of the fossil record form is only one over one million, its even lower ratio to form the petrified wood fossil jade. Because of the specialty of nonrenewable natural fossil, some Southeast Asian countries government has declare the cultural heritage to The United Nations, and also make a lot of tough measures to prevent exploit and export of petrified wood fossil jade. When a thing is rare, it becomes precious, petrified wood fossil jade is becoming less and less but its price is much lower than other jade, so it’s one of the best collectible stone in the market. Maintenance method of petrified wood fossil jade. Nowadays someone will coated with a layer of oil, the truly maintenance is not coated with oil, its to maintenance of water. We can put the petrified wood fossil jade into a glass-frame cabinet, and put 1 or 2 bottle of water into it. Use soft and clean wet towel to cover the petrified wood fossil jade. Fill the water into barrel and put the petrified wood fossil jade into barrel about 3 to 5 days. We assure all of the stone we sell are 100% natural without any painting, each of the stone are unique and made by natural, if you like it, do not miss it. The item “Bonsai Suiseki PETRIFIED WOOD Display Specimen Unpolished display natural stone” is in sale since Friday, June 16, 2017. This item is in the category “Collectibles\Rocks, Fossils & Minerals\Crystals & Mineral Specimens\Display Specimens”. The seller is “milia_3″ and is located in , . This item can be shipped worldwide.