Richard's task in this kind of case is to identify what is precious ivory and what is just bone. One of the key features he looks for are these lines known as Schreger lines, unique to elephant ivory. The thing to remember here is that every turn, every facet you can actually see the Schreger lines. It's spectacular, isn't it? Yeah. So how does ivory compare to bone? The main differences is with bone you have these pits on the surface, they're called Haversian pits. And the pits actually represent the channels that the blood vessels pass through within the bone. Now you won't find on the surface of any ivory object these Haversian pits. So that's a very good thing to look for. You can really see the pits there. Exactly. Okay. And you can't see any Schreger lines. The man who'll be cross-examining me is lawyer Mark Solon. With over 30 years experience in the courtroom, today he trains would be expert witnesses.


在这件案子里，理查德的任务是分辨哪些是珍贵的象牙，哪些只是普通的骨头。他查找的一个关键特征，就是这些象牙所特有的史垂格线。要记住每个拐角，每个面上都能看到史垂格线。 -真是神奇 -对 骨头和象牙有什么区别呢？ 二者主要区别，就是骨头表面的这种哈弗斯凹点。这些凹点实际上就是骨头里的血管，任何象牙的表面，都不会有哈弗斯凹点。这是辨别的一个好办法，这里真的能看到凹点。 没错，而且看不到任何史垂格线，将要盘问我的这个人是马克·索伦律师。 这位律师有30多年法庭经验，今天，他将训练我这位伪专家作证。