In the fall of 2009 Stone Group Labs received an unusual item for identification. It turned out to be manufactured of hornbill ivory. Reported by Cara Williams:
We have examined the carvings in the necklace and earrings and determined they are a natural ivory from the Helmeted Hornbill bird, native to Indonesia. The hornbill is now an endangered species, but due to the apparent age of the jewelry, this item would be legal for trade. Hornbill ivory is not a true ivory as it is not a dentine material, but rather a keratin. Hornbill ivory of this nature was often carved from the lower layer of the hornbill casque for the western market. The upper area, with a strong red coloration, was traded to the Eastern market. The upper areas of these pieces yet show some of the red coloring. The rest is in the strong yellowish color of natural hornbill.