After a prov. CO by crochet you start with the main pattern in between garter stitch edges with cords. Two coloured Half-Patent ribbings are beginning and end of the scarf, an Icord is the framing of the scarf.
Size of the scarf app. 140 cm x 24 cm

Techniques:
prov. CO by crochet and re-opening it
shadow technique
slip stitches
two coloured “Half Patent”
Picking up stitches from garter stitch edges
Icord BO with 3 sts

Material Alternatives:
just Camel DK/ Alpaca Fino from Pascuali
Worsted/ Silky Merino from malabrigo
Bio Wool / Atlântico from Rosários4
Pima Cotton from Ferner Wolle

Tools:
1 circular needle size 4.5 no matter what length
1 really long circular needle 100-120 cm for the icord edge (same needle size)
1-2 long thin auxiliary circular needles to pick up the stitches from the edge
1-2 stitch markers
smooth left-over yarn for the temporary cast on
1 crochet hook to match the left-over yarn