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Opus Vermiculatum

Opus Vermiculatum

Opus vermiculatum is used as a designation for fine mosaic work. The problem is that there does not seem to be any real agreement and in my opinion it is very misused. It is not a phrase from antiquity, it is a modern creation. I am putting as many definitions as I can find and hopefully it will be made clear what it should be used for.

 Definition Tesserae size  Authors 

Opus vermiculatum is a method of laying mosaic tesserae to emphasise an outline around a subject. This can be of one or more rows and may also provide background contrast, eg as a shadow, sometimes with Opus tessellatum. The outline created is often light and offset by a dark background for greater contrast.                                                                            

Not given  Wikipidia