Curlicue means: “A fancy twist or curl, such as a flourish made with a pen.”. Curve is the essential means in decoration of all human artifacts.
Filigree means: “Delicate and intricate ornamental work made from gold, silver, or other fine twisted wire.”.
[etymology of curlicue https://www.etymonline.com/word/curlicue]
1843, American English, from curly + cue, perhaps from French queue “tail” or letter Q in its looping script form. Earlier in this sense was curlie-wurlie (1772).