Original Message:   Re: Re: Polar Bear ID

Note the distinct demarcation between the inner and outer dentine, and the outwardly radiating lines. https://www.fws.gov/lab/ivory_natural.php#walrus 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. Copyright 2024 All rights reserved by Bead Collector Network and its users

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