Please choose the correct ending to complete the given sentence: Education and Communications: [header] How to tell if a cameo is authentic [title] Know which materials are most authentic. [step] Authentic carved cameos can be made of shell or natural stone, while authentic painted cameos are typically made from porcelain. [substeps] As a general rule, any carved cameo made from a natural material can be considered authentic.

Ending1: Carvings made from authentic metal can hold in the impression of a court court-made ware. The authentic copper may be compared to real wooden cameos in the form of marble or brass, in which one will work well, but aren't as convincing. Ending2: Some of the materials used include shell, agate, carnelian, onyx, ivory, lava, coral, jet, bone, mother of pearl, and various gemstones. A cameo is referred to as being non-authentic or fake if it has been made with plastic or resin. Ending3: Remember that the original shell used may not be authentic if it denotes artificial produce or other things the seller chose. Even authentic carved cameos have been fashioned to identify authentic children, so be wary of anyone who claims them as authentic. Ending4: However, authentic cameos are not very difficult to find. These models are expensive and self-nourishing, though they typically contain a known array of organic materials that you can use to build and attach them.

Answer format: ending1/ending2/ending3/ending4