I bought a beautiful, gold, herringbone necklace.
Herringbone is a type of fabric cloth. It has a distinctive type of weaved pattern and it achieves its name because it has similarities to the pattern of a herringbone fish.
I believe you are referring to a "herringbone stitch." Here is a video link showing how to make a herringbone stitch: http://www.wonderhowto.com/how-to-herringbone-stitch-191551/
Herringbone isn't a fibre - it's a weave pattern. Could be made from natural, or synthetic fibres.
Herringbone. Dogtooth
You can purchase a 14k gold herringbone chain from the Amazon website. Once on the page, type "14k Gold Herringbone Chain" into the search field at the top of the page and press enter to bring up the chains.
brunellesci
the length is about 22"
Herringbone braid
The Lands' End Herringbone Blanket uses the highest quality wool and is designed to be enjoyed. It will not bother your skin at all.
It's best to take it to a jeweller
Herringbone is a pattern consisting of adjoining vertical rows of slanting lines, any two contiguous lines forming either a V or an inverted V, used in masonry, textiles, embroidery, etc whereas wool is the fiber that is used to construct the herringbone pattern of the fabric.