Preppy Argyle Diamond Trio Crochet Appliqué Free Pattern

Preppy Argyle Diamond Trio Crochet Appliqué – Free Beginner Pattern

Introduction

If you have never held a crochet hook before, this is the perfect very first project for you. Each little diamond is worked flat in simple single crochet, one short row at a time, so you will never feel lost or overwhelmed. The magic happens through a classic argyle color-block pattern of forest green, cream, and soft pink that gives these tiny shapes their instant prep-school flair. When you are finished you will have three crisp, flat diamonds, each about 2.5 inches wide and 3 inches tall, with sharp points and a tight, even texture. Stitch them in a row onto a sweater, a tote bag, or a shirt collar and you have a boutique-style embellishment made entirely by your own hands.

Materials Needed

• Yarn: Worsted weight (category 4) acrylic or cotton yarn in three colors: Forest Green (A), Cream (B), and Soft Pink (C). Small amounts only — approximately 10 yards total per diamond (about 30 yards for all three).
• Crochet hook: E/4 (3.5 mm) crochet hook.
• Stitch markers: 2–3 removable stitch markers (helpful for counting rows and holding your place).
• Tapestry needle: A blunt-tipped needle with a large eye for weaving in ends and for stitching the appliqués onto your project.
• Scissors: Small, sharp craft scissors.
• Optional: A steamer or iron for light blocking, and matching sewing thread if you prefer thread over yarn for attaching.
• Finished size: Each diamond measures approximately 2.5 inches (6.5 cm) wide x 3 inches (7.5 cm) tall. You will make 3 diamonds.

Abbreviations and Beginner Glossary

• ch – chain. Make a loop with the yarn, pull the working yarn through the loop. Each loop you pull through is one chain stitch.
• sc – single crochet. Insert your hook into the stitch, wrap the yarn over the hook, pull up a loop (you now have 2 loops on the hook), wrap the yarn over again, and pull it through both loops. One single crochet made.
• sc2tog – single crochet two stitches together (a decrease). Insert your hook into the first stitch, pull up a loop, insert your hook into the next stitch, pull up a loop (3 loops on hook), wrap yarn over and pull through all 3 loops. Two stitches become one.
• st / sts – stitch / stitches. The individual loops you work into.
• 2 sc in the same st – work two single crochet stitches into one single stitch. This is an increase and adds one stitch to your row.
• turn – flip your work over so you can work back across the row you just made.
• fasten off – cut the yarn a few inches from your work, pull the tail all the way through the last loop, and tighten to secure.
• weave in ends – thread a yarn tail onto a tapestry needle and run it back and forth through the back of your stitches so it disappears and cannot unravel.
• whipstitch – a simple sewing stitch: bring the needle up through both layers, wrap the yarn over the edge, and go back down, repeating along the edge to join two pieces.
• wrong side – the back of your work, the side that will face inward or against the garment.

Gauge

Gauge: 4 sc x 4 rows = 1 inch (2.5 cm) in single crochet.

Why gauge matters: Gauge is simply how big your stitches turn out. If your stitches are looser than the gauge, your diamond will be larger than 2.5 x 3 inches; if tighter, it will be smaller. Because these diamonds must match each other and fit the spot you plan to decorate, matching gauge keeps all three identical.

How to make a gauge swatch: With Forest Green, chain 11. Work 1 sc in the second chain from the hook and in each chain across (10 sc). Work 10 rows of single crochet, chaining 1 and turning at the start of each row. Lay the swatch flat and measure a 1-inch square in the middle. You should count 4 stitches across and 4 rows tall. If you have more stitches per inch, try a larger hook; if fewer, try a smaller hook.

Beginner Tips Before You Start

• Count every row. These diamonds are only 18 rows long, so keep a tally on paper or use a stitch marker every few rows. It is the easiest way to stay on track.
• Do not pull your yarn too tight. Tension should be relaxed and even. Tight stitches make it hard to insert your hook and make the diamond curl.
• Change colors on the last pull-through. When the pattern says to change color, finish the very last loop of the previous row with the new color. This keeps the color blocks clean.
• Carry the unused colors loosely. Let the yarn you are not using rest along the wrong side without pulling. If you pull it tight, the diamond will pucker.
• The ch 1 at the start of each row does not count as a stitch. Your first single crochet goes into the first actual stitch, not into the chain.
• Make all three diamonds before attaching anything. That way you can compare them and block them to the same size.

Step-by-Step Instructions

Notes

Each diamond is worked flat in single crochet in turned rows, changing colors to create the argyle color-block pattern. Carry unused colors loosely along the wrong side; do not cut yarn between color changes within a diamond. Ch 1 at the beginning of each row does NOT count as a stitch. Make 3 diamonds total, identical in color placement.

Color Sequence Per Diamond (row by row)

• Row 1: A (Forest Green)
• Row 2: A
• Row 3: B (Cream)
• Row 4: B
• Row 5: C (Soft Pink)
• Row 6: C
• Row 7: B
• Row 8: B
• Row 9: A
• Row 10: A
• Row 11: B
• Row 12: B
• Row 13: C
• Row 14: C
• Row 15: B
• Row 16: B
• Row 17: A
• Row 18: A

Diamond (make 3)

With Forest Green (A), ch 2.

Row 1: 1 sc in 2nd ch from hook. (1 sc)

Row 2: Ch 1, turn. 2 sc in the same st. (2 sc)

Row 3: Ch 1, turn. Change to Cream (B) in the last pull-through of the previous row. 2 sc in first st, 1 sc in next st. (3 sc)

Row 4: Ch 1, turn. 1 sc in each st across. (3 sc)

Row 5: Ch 1, turn. Change to Soft Pink (C). 2 sc in first st, 1 sc in each of next 2 sts. (4 sc)

Row 6: Ch 1, turn. 1 sc in each st across. (4 sc)

Row 7: Ch 1, turn. Change to Cream (B). 2 sc in first st, 1 sc in each of next 3 sts. (5 sc)

Row 8: Ch 1, turn. 1 sc in each st across. (5 sc)

Row 9: Ch 1, turn. Change to Forest Green (A). 2 sc in first st, 1 sc in each of next 4 sts. (6 sc)

Row 10: Ch 1, turn. 1 sc in each st across. (6 sc)

Now begin decreasing to form the bottom point of the diamond:

Row 11: Ch 1, turn. Change to Cream (B). Sc2tog over first 2 sts, 1 sc in each of next 4 sts. (5 sc)

Row 12: Ch 1, turn. 1 sc in each st across. (5 sc)

Row 13: Ch 1, turn. Change to Soft Pink (C). Sc2tog over first 2 sts, 1 sc in each of next 3 sts. (4 sc)

Row 14: Ch 1, turn. 1 sc in each st across. (4 sc)

Row 15: Ch 1, turn. Change to Cream (B). Sc2tog over first 2 sts, 1 sc in each of next 2 sts. (3 sc)

Row 16: Ch 1, turn. 1 sc in each st across. (3 sc)

Row 17: Ch 1, turn. Change to Forest Green (A). Sc2tog over first 2 sts, 1 sc in next st. (2 sc)

Row 18: Ch 1, turn. Sc2tog over 2 sts. (1 sc)

Fasten off and weave in all ends.

Assembly and Finishing

Blocking: Lay each diamond flat on a towel or blocking mat, wrong side down. Pin the top and bottom points so they are sharp and the side edges are straight. Hold a steamer (or an iron set to steam, held just above the fabric — never pressed down) over each diamond for a few seconds. Let them dry completely before removing the pins. This evens out the color blocks and gives crisp points.

Arranging: Arrange the three diamonds in a horizontal row with points touching, or spaced 1/2 inch apart, as you prefer. For a row of three, center the middle diamond and place the outer two equidistant on either side.

Attaching: Thread a tapestry needle with matching sewing thread or a length of Forest Green yarn. Working from the wrong side of the appliqué, use a whipstitch around the outer edge of each diamond: bring the needle up through both the appliqué and the garment, wrap the yarn over the edge, and go back down, repeating all the way around. Keep your stitches small and even so the edge stays neat.

Weaving in ends: Thread each remaining yarn tail onto the tapestry needle and run it back and forth through the back of several stitches, then trim close to the work. Never knot your ends — weaving hides them securely and keeps the surface smooth.

Pro Tips and Variations

• Change the palette: Swap the three colors for any trio you love — navy, white, and mustard for a classic look, or lavender, mint, and grey for something softer. Keep the same light-dark-light rhythm so the argyle pattern still reads clearly.
• Resize the diamonds: To make a larger diamond, add more increase rows before the center (each increase row adds one stitch) and match them with the same number of decrease rows afterward. Just keep the color bands in pairs of rows so the argyle blocks stay even.
• Substitute yarn: Cotton gives a crisp, matte finish that is ideal for totes and collars; acrylic is soft and slightly stretchy, perfect for sweaters. Whichever you choose, stay with worsted weight (category 4) and check your gauge so the finished size stays true.
• Try a border: For extra polish, work one round of single crochet in Forest Green around the entire outer edge of each diamond before attaching, working 1 sc in each stitch along the edges and 3 sc in each point to turn the corner smoothly.