I wanted to give mosaic crochet a try after watching this video. (Man, her speed is amazing!)
Here’s my start of a bathroom rug, modeled by the lovely Stella (she blinked!)
Like she says in the video, you just make stripes, using 2 colors, 2 rows per color. (If you don’t do 2 rows per color, you would have to carry your yarn back to the other end on the backside.) Then you just use your working yarn to dip down into the row below covering the stripe in places exactly as you see her do in the video. I’m not using a pattern, just winging it like I usually do, so I’m not getting anything really amazing looking like I would if I got one of her actual patterns, but its still pretty cool. It makes a nice thick piece, especially if you use single crochet instead of double, so it will make a great rug. This rug was my “do it randomly and see what it looks like” thing, so I tried both. You can see the single crochet near the bottom of the rug (inside the dc border).
I also experimented with Tapestry Crochet in this rug (near the top, looks like checkerboard). This is where you carry both colors and alternate using them. I found this harder to do with crochet than with knitting. It was easy going, but coming back with the back side facing me had me keeping my unused yarn on the side nearest me instead of in the back and out of the way, which was complicated.
If the video and description aren’t making a lot of sense for Mosaic, try this blog post by Interweave: