How to identify milk glass vs porcelain china milk glass serving dish AntiquesNavigator appraisal

Very unique and rare snuff bottle. Antique chinese imperial faceted transparent blue glass imperial snuff bottle this item can be shipped worldwide. Faceted Hexagonal Shape Transparent Blue Imperial Glass Snuff Bottle. The seller is twosided and is located in this country LV. Similarities sells for 4 or even 5 figures, please see additional pictures in a description.