Gold thread for Late Roman tunics ? (textile)

[Theodosius the Great]

Avete,

Is it known if Romans used thread of gold in their
tunics ? I'm unaware of any literary or archeological
evidence to suggest that they did.

But I do remember reading about a female Frankish
tunic from the late Merovingian or early Carolingian
period that did have gold thread woven into the cuffs.

Is the practice of using gold thread even known in
antiquity or is it a medieval innovation ?

I ask because I'm not sure whether to use trimming
that has shiny 'gold' thread patterns for my 6th century
Byzantine tunic.

Thanks in advance.

~Theo