That’s a crochet lace doily pattern, typically made using fine cotton thread and a small steel crochet hook. The design in your photo features a square lace motif with open mesh spaces, shell stitches, and picot edging — very classic in vintage lacework.

Here’s a step-by-step guide to make something like this:
🧶 Materials
- Crochet thread size: #10 cotton
- Crochet hook: 0.9 mm (as seen in your image)
- Scissors
- Needle for weaving ends
🪡 Pattern Instructions (Approximation)
Start from the center and work outward.
Round 1:
- Make a magic ring.
- Ch 3 (counts as dc), 15 dc into the ring.
- Join with sl st to top of ch 3. (16 dc)
Round 2:
- Ch 3, dc in same st, ch 1, 2 dc in next st.
- Repeat * around, join. (16 dc groups, 16 ch-1 spaces)
Round 3:
- Sl st to next ch space, ch 3, (dc, ch 2, 2 dc) in same space → first corner.
- Skip 2 dc, (2 dc, ch 2, 2 dc) in next ch-1 space → repeat for 4 corners.
- Join.
(You’re forming a square now.)
Round 4–6:
- Continue working (2 dc, ch 2, 2 dc) in each corner space and (2 dc, ch 1) along sides.
- This creates the grid-like structure.
Round 7–9:
- For the decorative arches: ch 5, skip 2 spaces, sc in next dc group, repeat around.
- Next round: work 5 dc in each ch-5 loop to make shell shapes.
Final Round (Edge):
- Sc, picot (ch 3, sl st in first ch), sc around each arch tip.
- Join and fasten off.
- Block the piece flat (spray with water, pin to shape, and let dry).
Would you like me to draw you a crochet diagram (symbol chart) for this exact motif? It’ll make it easier to follow visually.
