DeeDee249,
No! Cellulose exhibits birefringence properties when subjected to laser tests, i.e. cellulose is a birefringent material, meaning that the cellulose and Coroner Meyers remarks regarding a birefringent material can coincide.
What is unknown, is whether the birefringent material referred to in the Autopsy Report is cellulose, which leaves open the possibility that a wooden splinter and some other unidentified object, i.e. the birefringent material was found inside JonBenet.
If this is the case why would Coroner Meyer cite one instance but not the other?
We don't know for sure that the cellulose and birefringent material are one and the same. We DO know that wood splinters were found in her vagina. The autopsy mentions the birefringent material and does not specify if they are the SAME materiel as the cellulose. In autopsy notes, the coroner describes what he SEES before the material is tested, even if he knows what it is. That is why the wood splinters would be described as cellulose. The jewelry she was wearing is described as "Yellow metal", not as "gold" even though it is obvious it is gold jewelry. The testing of the jewelry determines whether it is gold filled, 10K, 14K, 18K, etc. but that description does not go into the report because the testing is done at a different time. So it is noted as "yellow metal" because literally that it what it is. It is the same for the cellulose. It may be wood, may be part of the paintbrush, may be come other thing, but until it is independently tested apart from the autopsy itself, it is "cellulose" for the purposes of the written autopsy. In all the books I have read, I have never seen the birefringent material definitively names as to what it really was. Talc, paint chips or varnish from the paintbrush, or the splinters themselves.