When I saw this posting on facebook I knew that would be the subject for this week's blog. Ivory from African elephants particularly, but also from Asian elephants, walruses, and narwhal has been used in the past for the white keys on pianos, billiard balls, and decorative items.  I inherited a couple of items containing ivory from my mother-in-law, who collected antiques – a group of elephant statuettes, carved out