Crochet equiv of Brioche or half-fisherman's?

My son has asked me to knit an afghan for his GF’s b-day - in 3 wks! I know that is not happening, but I was thinking if I could crochet it, it would go faster. The afghan she wants (from a catalog, no pattern available) looks like it is a fisherman st, or half fisherman st, or maybe Brioche.
Anybody know a crochet st that makes something looking similar? It is for bulky cotton yarn.

Here is the pic http://www.designpublic.com/shop/twinkle-living/8567

Looking at the photo in the link, the closest I can think of seems like half-double stitches using double strands or bulky yarn.

I don’t think that would give the angularity I’m looking for…

Here is a close up of the stitching in a poncho I once did in double-stranded half-double crochet – it looked similar to me.

For some reason the photo didn’t take, so here is the url of the image: http://www.pearledsand.com/images/poncho-detail.jpg

I don’t know what you mean by “angularity” – if you wanted it to be more like ribbing, you could try a swatch with half-double crochet in back loops only?

ooh! That is good. Also, I just found a pic in S & B Happy Hooker, of herringbone half double crochet - it looks a lot like the blanket pic. I googled and got quite a few hits for videos, but none of them panned out. But I think the directions in S&B are fairly straightforward so I will give it a shot and report back!

Oh, and I just saw your comment on angularity - I mean, the yarn goes at an angle back and forth, not just straight up and down. If that makes sense!

[color="#330099"]The textured stripe seems like a close match including the diagonal “rib” in the stitch.

I found it on Ravelry as [U]Textured Stripes Dishcloth[/U] by Kiel Lemon and she posted her pattern on her web site, [U]Cocoa Cream’s Craft Closet[/U]

It just uses an alternating slip stitch and half-double crochet (HDC); you slip st into the top of a HDC and then HDC into the top of the next slip st.
I made a variation using two colors. The yellow in the following image has the diagonal ridges that I though of when I saw your pattern images.
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