Inside: How to Make a Modern Mosaic Quilt Block
When looking at quilt blocks for this series I always search for something unique or special about a block.
This quilt block is one with lots of names, and none of them are consistent. In my EQ8 software this block is called Mosaic #5.
If you look up mosaic quilt blocks, you’ll see them named Mosaic #1, Mosaic #2, etc. And none of these number-names are consistent.
I consulted my Encyclopedia of Pieced Quilt Patterns and found that mosaic blocks, indeed, go by numbers. But, it’s inconsistent on which one is actually Mosaic #5.
So, I’m calling this one the Modern Mosaic Quilt Block. Bottom line, I know you’re going to love how easy this quilt block is to make.
And be sure to grab the FREE PDF assembly diagram below.
How to Make a Modern Mosaic Quilt Block
I chose this block because it’s all half square triangles (HSTs). That’s it, if you can piece HSTs, ya’ got this!
The Modern Mosaic Quilt Block offers you some variety because it can be dramatically different depending on your fabric choices.
This block is very economical. I used some solid fat quarters that were in my stash. As long as you choose fabrics that have a contrast, anything will work.
- Solid Fabric #1 (Coral)
- Solid Fabric #2 (Dark Turquoise)
- Solid Fabric #3 (Light Turquoise)
- White Fabric (Kona White #1387)
Basic Sewing Supplies Needed
- Sewing Machine
- It’s nice to use a 1/4″ sewing foot to help maintain a perfect seam allowance
- Cotton Thread
- I prefer Aurifil 50 wt. thread
- Sewing Pins
- Rotary Cutter with sharp blade
- Acrylic Ruler
- Rotary Cutting Mat
- Iron & Ironing Board
Cutting and Marking
Iron your fabrics nice and flat to remove any wrinkles. Use the cutting measurements below to get your pieces cut out and in order.
- Qty (2) 4″ x 4″ Coral (A)
- Qty (2) 4″ x 4″ Light Turquoise (B)
- Qty (6) 4″ x 4″ Dark Turquoise (C)
- Qty (6) 4″ x 4″ White (D)
Make Half Square Triangles (HST) 2-at-a-Time
Follow the diagram below to make the Coral/Light Turquoise HSTs (2) and the Dark Turquoise/White HSTs (6).
- Place a light and a dark fabric square right sides together.
- Use a pencil or water soluble marker, draw a diagonal line from one corner to the opposite corner.
- On both sides of the diagonal line, stitch a scant 1/4″ seam. See How to Sew the Perfect Quilting Seam Allowance for more details.
- Using a quilter’s ruler and rotary cutter, cut along the pencil line.
- Press seams to one side.
- Trim each HST down to 3 1/2″ x 3 1/2″.
Note: The best way to get perfect points is to use a quality ruler such as this one by Creative Grids when trimming your HSTs. See the image below.
Mosaic Block – Assembly
The only challenge (besides choosing fabrics!) is matching points. As long as you pin your points, it should go together smoothly.
- Arrange your individual Mosaic squares in correct layout (pictured below).
- Using a quarter inch seam allowance, sew together the top row. Press seams in same direction. Repeat for the next three rows. Alternate pressing direction on each row.
- Join rows using a quarter inch seam allowance. Take time to nest your seams. Pinning will help with matching.
- Press your completed block and trim down block to 12.5″ square (if necessary).
Get a FREE PDF Download
The block assembly diagrams are available in a FREE downloadable PDF that includes assembly diagrams for the Modern Mosaic Quilt Block with HST’s 2-at-a-Time.
Please follow the directions in the box below and the assembly diagram will be sent directly to your inbox. Note: Current Subscribers can re-enter their email but won’t be double subscribed.
Don’t you love the Modern Mosaic Quilt Block. Because of its simplicity, the options for this easy quilt block are fun to imagine!
Check out this fun quilt I designed using 16 blocks.
The Modern Mosaic Quilt Block is a fun and easy quilt block with unlimited possibilities.
Did you like this post? Check out a few of the other Quilt Blocks in this Series.