Here is a step-by-step tutorial to crochet the beautiful open-fan / shell lattice stitch shown in your image. This stitch is airy, lacy, and perfect for scarves, blankets, shawls, and baby items.

⭐ Super Detailed Crochet Tutorial – Shell Lattice Stitch

This stitch uses repeating groups of 3 double crochets (3-DC shells) with open spaces between them.

🔹 FOUNDATION

Step 1 — Make your starting chain

Chain a multiple of 4 + 3
(Example: 28 + 3 = 31 chains)

Why?
Because each repeat uses 4 chains (skip-2, shell, skip-2, DC).

🔹 ROW 1 (Detailed)

👉 Step 2 — Start Row 1

Yarn over
Insert your hook into the 4th chain from the hook
Make 1 double crochet (DC)

This counts as your first “anchor DC”.

👉 Step 3 — Make your first shell

Skip 2 chains
Into the next chain, make:
- 3 DC into the same chain
  This is your shell cluster.

You should now have:
DC — skip 2 — 3 DC — skip 2 …

👉 Step 4 — Make the next anchor DC

Skip 2 chains
Make 1 DC into the next chain

This “DC + shell + DC + shell” repeats across the row.

👉 Step 5 — Finish Row 1

End the row with 1 DC in the last chain
Chain 3 and turn your work
(ch 3 = counts as a double crochet)

Your row should look like alternating shells and single DC posts.

🔹 ROW 2 (VERY Detailed)

This row builds the beautiful “open diamond” pattern.

👉 Step 6 — First stitch of the row

Skip the first DC under your turning chain
(the ch-3 already counts as your first DC)

👉 Step 7 — Make shells between shells

You do NOT insert your hook into a stitch.
Instead, look for the big space between your 3-DC shells from Row 1.

In that space:

Make 3 DC into the gap.

This is how the shells “stack” and create the lace look.

👉 Step 8 — Make the next anchor DC

After making the shell:

Insert your hook into the top of the next single DC
Make 1 DC

This gives structure so the shells don’t spread too far.

👉 Step 9 — Repeat to the end

Across the row, repeat:

3 DC in shell space
1 DC in top of next DC

👉 Step 10 — End the row

Make 1 DC into the top of the turning chain
Chain 3, turn

Your pattern now shows:

Puffy shell fans
Diamond-shaped holes between them

🔹 ROW 3 AND ONWARD

Repeat Row 2 again and again.

Each new row:

Places shells inside the “shell gap”
Places one DC on top of the DC from the row below
Makes perfect alignment and airy texture

🧩 What You Should See

✔ Diagonal diamond holes
✔ Puffy 3-DC shells
✔ Very soft, textured appearance
✔ Exactly the same look as your image

How to make Crochet Pattern