Better policing of dealers can help, but ensuring that Liberia has its own credible certification scheme will ensure that less Liberian rough are deliberately mixed with rough of neighbouring countries.
加强对钻石商的管制可能有用，但确保利比里亚有自己可信的验证制度将减少利比里亚粗金刚石故意与邻国的粗金钻石混合起来的情况。