These take a while to make, but the end result is worth it. They're actually pretty easy.
It's very similar to the other how-to I've posted, awareness ribbon friendship bracelets. If you can do one you can do the other.
Pick out some nice colours. I feel spring-like today :P You need a ton for your background colour. I used a whole skein of that yellow and a little bit from another. You only need a normal amount for the colour of the diamonds.
I'm just gonna say yellow and purple for now, you convert it to your colours when you're doing it.
Cut six strands of yellow that are twice as long as your arm.
Cut two strands of purple that are twice as long as your arm plus about 10 inches. They do most of the knotting so they need to be longer in order to not run out. It's shown better in step 4.
Side note: Yes, that's my laptop. I like having a nice background for these and I didn't want to move all my stuff over to the table.
Make two separate bracelets. Each one has three yellow strands and one purple strand.
To make sure that the purple strands' extra length is distributed evenly, fold the purple strand in half, then fold all the yellow strands in half, and put the bent parts together and tie a know. (instead of lining up one end and folding in half - then you'd have a long purple one and a short one.)
There are two ways you can end the bracelet. To do both you need to get to a point where you just made two diamonds next to each other and haven't filled in the sides.
The first way is to separate the strands into two bracelets again, and start making more chevrons separatley, and then make the braids.
(I wanted to post the how-to right away so I didn't bother to finish the yellow one.)
TIPS IF YOU'RE LAZY (like me)
That's a lot of tying to do for a whole wrist. If you're sick of making diamonds, there are two things you can do to make your bracelet longer:
1. Untie the knots at the top. This adds a lot of length. Try jamming a paperclip in there.
2. Make the braids on the end really long. That way you can just tie the braids at their ends and have lot of braid going around your wrist.