Historically, genuine ivory has been difficult to obtain, highly sought after and, consequently, an expensive luxury item. In some ways ivory is very similar to precious metals and gemstones.
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Learn More »Ivory is formed by living growing tissue. The direction and forms of growth are unique to each ivory producing species (see illustrations page 41). These unique grain structures have so far been impossible to duplicate in artificial substances like plastics and resins. Generally, grain always runs along the long dimension of a piece of authentic worked ivory. Attempts to put grain in artificial ivory go back over 100 years. Celluloid, one of the earliest plastics invented in 1868, has a prominent grain. Grain in celluloid and other artificial ivory is usually easy to detect because it normally appears as nearly perfectly parallel lines and shows a definite repeating pattern. Grain in natural ivory is random without any noticeable pattern. A repeating pattern with uniform even lines is almost always a sign of a man-made artificial ivory. The presence of grain also allows us to eliminate other natural non-ivory materials such as bone and glued together ivory dust. But like the black light test, grain alone does not guarantee a piece is ivory. You must use several tests before you can make an accurate judgement.
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Read More »The critical point to keep in mind is the need for multiple tests. No one test provides an accurate basis for judgement. Under normal circumstances, genuine ivory (with no or little patina) should appear white under long wave black light and genuine ivory always has grain. Elephant ivory always has Schreger Lines, a cross hatch pattern, when seen in cross section. Translucence is an ivory characteristic that can be helpful in differentiating it from bone, as bone is an opaque substance. Anyone dealing in ivory needs to know the laws regulating its sale, display and transportation. The primary federal laws governing ivory are: The Endangered Species Act, Lacey Act, Convention On International Trade in Endangered Species (CITES), and African Elephant Conservation Act. Copies should be available at larger public libraries and most U.S. Fish and Wildlife offices.
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