If it is difficult to interpret an object, then we may wish to split open, it is clear that he is of cordierite and insulators cordierite insulator. Necessary to both substances to be understood, I believe you will have a different harvest. The following content is provided by the Jiangsu Province Ceramics Research Institute.
Cordierite he is a colored silicate, generally showing a light blue or light purple. She also has a feature in different directions when he showed not the same color, this is his pleochroism. Often cordierite as a gem in industry, in fact, he is not that great. We can put him through artificial synthetic magnesium cordierite, good fire-resistant.
The insulator is an insulated control, overhead transmission line circuit has a good application. Wire rod inside, and now we will use it in a high-voltage wire, also to be able to increase his creepage length generally use glass or ceramic production. Can not let the insulator failure with the environment as well as the change in the charge, it makes the entire line damage.
Introduced separately, we should be able to know that the cordierite insulators information, we sometimes also called cordierite ceramic insulators, because the presence of ceramic insulator manufacturing materials.（picture/text http://www.jiangsuceramics.com/）