Honest Tanzanite Sellers

As an online seller of Tanzanite (our company site : http://www.lapigems.com/tanzanite.asp ) I have been perturbed recently at the number of sites trying to volume sell this rare gemstone with no thought to quality or properly classifying what they are selling. As a gemologist, it is very important to me that stones sold online are properly represented in order to build confidence in online gem selling for the benefit of the entire industry. How to establish a universal grading system is at the core of the problem. We welcome any independent ideas on the subject to this blog.