That crochet pattern in your image looks like a two-tone shell or cluster stitch border, made with soft yellow and mint green yarn. It uses basic crochet stitches — mostly chains, double crochets, and shell-like clusters.
Here’s how to make it step-by-step:
🧶 Crochet Two-Color Shell Border Tutorial
✳️ What You’ll Need
- Yarn: Two colors — Color A (light yellow/cream) and Color B (mint green)
- Hook: 2.5 mm (as shown on your Tulip hook)
- Scissors and yarn needle

🌼 PART 1 — Yellow (Base Section)
Step 1: Make the Foundation Chain
- Start with Color A (yellow).
- Chain a multiple of 4 + 2 extra chains (example: 26 chains = 24 + 2).
- The multiple of 4 fits the shell pattern repeats.
- Count your stitches carefully so each repeat fits evenly.

Step 2: Row 1 — Shell Base
- Yarn over, insert hook into 4th chain from hook, and make 1 double crochet (dc).
(The skipped 3 chains count as your first dc.) - Skip 1 chain, then make 2 dc in the next chain — this is your small “shell.”
- Repeat this pattern:
- Skip 1 chain, 2 dc in next chain
- Continue until the end of the row.
- Turn your work.
🧵 Tip: Your row should look like groups of 2 dc clusters separated by small gaps.
Step 3: Row 2 — Building the Texture
- Chain 2 (counts as first dc).
- Make 2 dc in the space between the 2-dc clusters from the previous row.
- Repeat across the row:
- 2 dc between each cluster gap
- End with 1 dc in the top of the turning chain from Row 1.
- Fasten off the yellow yarn.
💛 You now have a soft, dense base with tiny shell textures.

🍃 PART 2 — Mint Green (Lacy Border)
Step 4: Attach the Green Yarn
- Attach Color B (mint green) to the first stitch of the last yellow row.
- Secure with a slip knot and chain 3 to start.
Step 5: Row 3 — Open Chain Loops
- Chain 1 (counts as space), skip 2 stitches,
then make 1 double crochet (dc) in the next stitch. - Repeat the pattern across:
- (ch 1, skip 2 sts, 1 dc in next)
- End with a dc in the last stitch.
- Turn your work.
This creates the light green openwork look you see in the photo — gentle arches on top.
Step 6: Optional Finishing Touch (Optional)
If you want a polished edge:
- Chain 1, make 1 single crochet (sc) in each dc and in each chain space across.
- Fasten off and weave in all loose ends.

✨ Result
You’ll have:
- A soft, textured yellow shell pattern base.
- A light green airy lace row on top that adds color and contrast.
Perfect for:
- Baby blankets
- Decorative borders
- Shawl edges
- Spring/summer crochet projects