*Diamonds hat* Brioche Knitting Patterns

Diamonds Hat is a brioche knitting pattern worked in brioche rib stitch. The hat's diamond motif is based on Nancy Marchant's pattern from "Knitting Fresh Brioche" where you can find a scarf pattern with the same diamond motif.
If you knit 2 repeats of the pattern in height it will be a normal beanie, for a slouchy one knit 3 and more pattern repeats.
More brioche hats

Yarn:

MC: DK weight
CC: Kartopu Zambak

Needles:

US 2 - 2.75 mm, US 3 - 3.25 mm
circular 16” - 40cm, circular 32” - 80cm

Notions:

Marker (m), tapestry needle

Abbreviations:

k - knit
p - purl
brk - brioche knit
brp - brioche purl
sl1yo - slip 1 pwise with yarn over needle
sl1 wyib - slip 1 pwise with yarn in back
sl1 wyif - slip 1 pwise with yarn in front
brLsl dec - brioche left slant decrease
brRsl dec - brioche right slant decrease
brkyobrk - brioche knit, yarn over, brioche knit
MC - main color yarn
CC - contrast color yarn
m - marker
st(s) - stitch(es)

Directions:

With main color yarn cast-on:
(8 stitches x 8 pattern repeats) + 1 stitch for joining the round = 65 stitches 

1. Set-up round:
Work row 1 with main color yarn.
Round 1 MC: *k1, sl1yo; rep from*.
After that, join the contrast color yarn and work round 2.

2. Brim:
Repeat rounds 2-3 until reached the desired brim height. Finish with round 4.

Round 2 CC: *sl1yo, brp1; rep from*.
Note: knit the “brkyobrk” sts from previous row as: sl1yo, p1, sl1yo
After each even round in contrast color yarn, pick-up the main color yarn and knit the odd round.

Round 3 MC: *brk1, sl1yo; rep from*.
After each odd round in main color yarn, pick-up the contrast color yarn and knit the even round.

Round 4 CC = round 2

3. Intermediate rounds:
Knit these rounds once after brim and before pattern.
Since the brioche rib with no pattern (like the brim) is always looser than brioche with pattern, before starting the pattern we are increasing the number of stitches so that the brim is tighter than the rest of the hat. That's the purpose of these intermediate rounds:

Round 15 MC: *brk1, sl1yo, brkyobrk, sl1yo, brk1, sl1yo, brkyobrk, sl1yo; rep from*.
Rounds 16, 17, 18 = rounds 2, 3, 4

4. Pattern:

Round 19 MC: *brLsl, sl1yo, [brk1, sl1yo] 3 times, brkyobrk; rep from*.
Rounds 20, 21, 22 = rounds 2, 3, 4

Round 23 MC: *brLsl, sl1yo, [brk1, sl1yo] 2 times, brkyobrk, sl1yo, brk1, sl1yo*.
Rounds 24, 25, 26 = rounds 2, 3, 4

Round 27 MC: *brLsl, sl1yo, brk1, sl1yo, brkyobrk, sl1yo, [brk1, sl1yo] 2 times; rep from*.
Rounds 28, 29, 30 = rounds 2, 3, 4

Round 31 MC: *brLsl, sl1yo, brkyobrk, sl1yo, [brk1, sl1yo] 3 times; rep from*.
Rounds 32, 33, 34 = rounds 2, 3, 4

Round 35 MC: *brkyobrk, sl1yo, [brk1, sl1yo] 3 times, brRsl, sl1yo; rep from*.
Rounds 36, 37, 38 = rounds 2, 3, 4

Round 39: *brk1, sl1yo, brkyobrk, sl1yo, [brk1, sl1yo] 2 times, brRsl, sl1yo; rep from*.
Rounds 40, 41, 42 = rounds 2, 3, 4

Round 43: *[brk1, sl1yo] 2 times, brkyobrk, sl1yo, brk1, sl1yo, brRsl, sl1yo; rep from*.
Rounds 44, 45, 46 = rounds 2, 3, 4

Round 47: *[brk1, sl1yo] 3 times, brkyobrk, sl1yo, brRsl, sl1yo; rep from*.
Rounds 48, 49, 50 = rounds 2, 3, 4

Repeat [rounds 19-50] 2-3 times for a less or more slouchy hat.


5. Crown:

Round 83 MC: *brLsl, sl1yo, [brk1, sl1yo] 4 times; rep from*.
Round 84 = round 2

Round 85 MC: *brLsl, sl1yo, [brk1, sl1yo] 3 times; rep from*.
Round 86 = round 2

Round 87 MC: *brLsl, sl1yo, [brk1, sl1yo] 2 times; rep from*.
Round 88 = round 2

Round 89 MC: *brLsl, sl1yo, brk1, sl1yo; rep from*.
Round 90 = round 2

Round 91 MC: *brLsl, sl1yo; rep from*.
Round 92 = round 2

In round 93 you knit the first stitch and then pass all the other stitches over this stitch. This way you bind-off the remaining stitches. Cut the yarns leaving ends long enough to weave in.

Chart:

Below you can see the Diamonds Hat Chart including all the rows. Just follow the steps and symbols indicated in the chart.