Re: Re: Polar Bear ID
Re: Re: Polar Bear ID -- Beadman Post Reply Edit Forum Where am I?
Posted by: Beadiste Post Reply
09/17/2018, 15:42:32

Note the distinct demarcation between the inner and outer dentine, and the outwardly radiating lines.

The dentine is composed of two types: primary dentine and secondary dentine (often called osteodentine). Primary dentine has a classical ivory appearance. Secondary dentine looks marble or oatmeal-like. This type of secondary dentine is diagnostic for walrus tusk ivory.

SAM_9279_-_Copy.JPG (247.2 KB)  

Copyright 2018
All rights reserved by Bead Collector Network and its users