Crochet Coaster Patterns

Free Pattern: The Ancient Trilobite Spike Coaster

Anonymous July 11, 2026
Free Pattern: The Ancient Trilobite Spike Coaster

Free Pattern: The Ancient Trilobite Spike Coaster

Introduction

Dive into the depths of prehistoric oceans with this textured crochet coaster inspired by the intricate exoskeleton of ancient trilobites. This unique design features a blend of spikes and ridges, perfect for adding a touch of natural history to your table setting. Whether you’re a beginner or an experienced crocheter, this coaster is a delightful project that will enhance your home decor.

Materials Needed

  • Yarn: Worsted weight cotton yarn in shades of deep sea blue and fossil grey.
  • Hook: Size H/8 (5.0 mm) crochet hook.
  • Scissors: For cutting yarn.
  • Tapestry needle: For weaving in ends.

Step-by-Step Instructions

Follow these detailed steps to create your Ancient Trilobite Spike Coaster:

  1. Round 1: Start with a magic ring using fossil grey yarn. Work 6 single crochet (sc) into the ring. Join with a slip stitch (sl st) to the first sc. You should have 6 stitches.
  2. Round 2: Chain 1 (ch 1), then work 2 sc in each stitch around. Join with a sl st to the first sc. You will now have 12 stitches.
  3. Round 3: Ch 1, then (sc in the next stitch, 2 sc in the next stitch) around. Join with a sl st to the first sc. You will have 18 stitches.
  4. Round 4: Ch 1, then (sc in the next 2 stitches, 2 sc in the next stitch) around. Join with a sl st to the first sc. You will have 24 stitches.
  5. Round 5: Ch 1, then (sc in the next 3 stitches, 2 sc in the next stitch) around. Join with a sl st to the first sc. You will have 30 stitches.
  6. Round 6: Switch to deep sea blue yarn. Ch 1, then (spike stitch in the next stitch, sc in the next 4 stitches) around. Join with a sl st to the first spike stitch. You will still have 30 stitches.
  7. Round 7: Ch 1, then (sc in the next stitch, spike stitch in the next stitch, sc in the next 3 stitches) around. Join with a sl st to the first sc. You will have 30 stitches.
  8. Round 8: Ch 1, then (sc in the next 2 stitches, spike stitch in the next stitch, sc in the next 2 stitches) around. Join with a sl st to the first sc. You will have 30 stitches.
  9. Round 9: Ch 1, then (sc in the next 3 stitches, spike stitch in the next stitch, sc in the next stitch) around. Join with a sl st to the first sc. You will have 30 stitches.
  10. Round 10: Ch 1, then (spike stitch in the next stitch, sc in the next 4 stitches) around. Join with a sl st to the first spike stitch. Fasten off and weave in any loose ends using your tapestry needle.

The finished coaster is a circular piece approximately 5 inches in diameter, featuring alternating rings of fossil grey and deep sea blue. The texture is a captivating mix of raised spike stitches and smooth single crochet, mimicking the ridged and segmented appearance of a trilobite's shell. Enjoy your new coaster that adds a unique touch to your home!