Maggie CP Organic Gem Materials

Maggie Campbell Pedersen, FGA, ABIPP - Specialist information and education in Organic Gem Materials.

New Articles for Subscribers


Rhino horn sold as bovid horn, and bovid horn misidentified as rhino horn.


Book ReviewsSee under 'Archive'. Click here: New Forum


Illegal Ivory and Old Ivory

How do we stop the poaching? Should we burn our ivory artefacts? These questions will be discussed in an article coming soon.




Don't miss this exhibition:


at the Powerhouse Museum, Sydney, Australia. Click on the link:








Book 'Gem and Ornamental Materials of Organic Origin.'

A useful reference book and the only one entirely devoted to the subject of organic gem materials.

Revised edition due at the end of August 2010.

Click HERE

Welcome to 'Organic Gems'

What are organic gem materials?
Those of plant and animal origin that can be used in jewellery or the decorative arts. The best known are amber and copal, jet, ivory, bone, antler, horn, tortoiseshell, pearl, shell and coral.

What is the information centre?
Organic Gems is the interactive information centre and online reference source devoted to organic gem materials. Articles published cover all aspects of organic gem materials: how to identify them, their uses, their origins, how they are worked, conservation, and much more. Some articles are educational, some are of general interest. You can subscribe FREE.

Is it by experts, or amateurs? Is it advertising something?

Organic Gems is a totally independent enterprise, and does not receive outside backing in any form. It is written entirely by qualified individuals, each one is an expert in his or her subject.

Is it for experts, or amateurs?
Organic Gems is suitable for everyone: gemmmologists, auctioneers, and people who have found Granny's old necklace in a drawer. The articles are easily accessible for anyone and form the ideal reference base on the subject of organics.


Important Notice to subscribers: Some difficulties have recently been experienced when logging onto the subscribers' section of the website. Please contact the editor if this is the case.

The website is being revamped and redesigned, and should be more user-friendly in future. In the meantime, please accept our apologies for any inconvenience caused,



'Organic Gems' online publication

'Organic Gems' - the reference source and interactive information centre, written by experts. Informative and educational -- for anyone interested in organic gem materials and their uses.

Lectures and seminars

An introduction to the fascinating world of organic gem materials. Maggie Campbell Pedersen gives Lectures, Seminars and Master Classes world-wide.


Available for purchase, for use in lectures or for publication.



without registering as a subscriber, click on the links below:

It's so pretty, but is it legal?

A look at the gems of animal origin (for example tortoiseshell, coral and ivory) that we cannot bring back from holiday because they are covered by trade bans.

Is it real amber?

A look at some of the amber fakes on the market today, and what to avoid when buying it.

The Green Amber Myth Does green amber really exist?

Cherry Amber & Vintage Amber Bakelite Does red amber really exist?

Recognising Ivory: elephant, walrus, hippo, narwhal, spermwhale, boar and mammoth ivories.

What is amber? What is copal? What is the difference between these resins?

The Amber v. Copal and 'Green Amber' Controversy. Comments on the differences standpoints.

Want to know more?

To register as a subscriber click HERE. It's free!



We would like to make it clear that this site,, has no connection to the maggiecp that is cited on, I-love-dogs, sick iguanas, cooking recipes or anything other than organic gem materials, which may appear when searching the internet!