This crochet stained glass cathedral placemat is a dramatic rectangular placemat inspired by cathedral stained glass, with jewel-tone ruby, sapphire, amber, and emerald panes divided by slim black crochet leading and framed by a double black border. The construction is designed specifically for the named project rather than adapted from a generic template.
A 61-stitch black foundation supports a flat color-block panel worked in fifty-eight counted rows. Four mirrored pointed panes are shaped with paired increases and decreases, black surface-crochet leading outlines every pane, and a folded envelope border encloses the carried ends.
Why You’ll Love This Project
The tapestry crochet, surface crochet, color blocking, envelope border create a distinct placemat with clear checkpoints, practical structure, and strong handmade texture.
Materials
- Approximately 260 yards black DK-weight cotton yarn
- Approximately 90 yards each ruby, sapphire, amber, and emerald DK-weight cotton yarn
- Eight locking stitch markers
- Rustproof blocking pins
- 4 mm crochet hook
- Yarn needle
- Scissors
- Tape measure
- Blocking mats and rustproof pins

Gauge, Measurements, and Planning
Make a generous swatch in the main stitch. The target gauge is 18 single crochet stitches and 20 rows = 4 inches; change hook size if needed before beginning the full runner.
Make and wash a gauge swatch before beginning. Measure only after the swatch is completely dry. If the stitch width differs, change hook size rather than pulling the working yarn tighter. Keep a written count at the end of every section so the finished edges remain balanced and the assembly points line up.
Abbreviations and Special Stitches
- ch: chain
- dc: double crochet
- hdc: half double crochet
- sc: single crochet
- sl st: slip stitch
- st(s): stitch(es)
- BLO: back loop only
- yo: yarn over
Special stitch guidance: Black leading line: surface slip stitch through the panel along a marked color boundary. Pane decrease: close two single crochets together while changing to the next jewel tone.
Before You Begin
- Maintain the stated 61-stitch construction count at every checkpoint.
- Beginning chains count only where explicitly stated.
- Block components before final assembly or border work.
- Use US crochet terminology throughout.
Instructions
Establish the Black Framework
Count carefully and compare the work with the finished measurements.
- Foundation Row: With black, ch 64. Sc in the fourth chain from the hook and across. Turn. (61 sts)
- Rows 1–4: Sc across in black, marking the center stitch and four 15-stitch pane sections. (61 sts)
- Keep every color change on the wrong side and retain two black edge stitches at both sides.

Build the Lower Jewel Panes
Count carefully and compare the work with the finished measurements.
- Rows 5–18: Follow the marked sections in ruby, sapphire, amber, and emerald, widening each pointed pane by one stitch at both edges every second row.
- Work one black stitch between neighboring panes so the leading remains continuous.
- Count 61 stitches after every row and carry only the active neighboring color.

Mirror the Cathedral Arches
Count carefully and compare the work with the finished measurements.
- Rows 19–44: Narrow the first pane points, open the upper mirrored panes, and reverse the color order for balanced arches.
- Rows 45–54: Close all four pane tips while expanding the black background between them.
- Rows 55–58: Work four solid black rows. (61 sts)
Outline and Frame the Placemat
Count carefully and compare the work with the finished measurements.
- Surface-slip-stitch black along every stepped pane boundary, keeping the fabric flat.
- Work two black sc rounds around the panel with 3 sc in each corner, then fold the second round inward and join as an envelope edge.
- Wet-block to 14 by 19 inches, pinning the arches and corners square.
Assembly and Shaping
Follow the project-specific assembly sequence for rectangular stained glass mosaic placemat. Pin or mark every component before joining and keep the finished layout balanced.
Lay every component on a flat surface before joining. Match the marked centers first, then divide each remaining edge into equal sections. Work through both layers with consistent tension and pause after each section to check that the fabric lies flat. This measured approach prevents twisting and keeps decorative details facing the intended direction.

Finishing
- Weave every tail through matching stitches and reverse direction once.
- Inspect all joins, motif anchors, and border corners.
- Block to 14 inches wide by 19 inches long.
- Allow the runner to dry completely before styling.
For a polished result, weave each tail through several same-color stitches, reverse direction once, and trim only after the fabric has been gently stretched. Block to the listed dimensions without flattening textured stitches. Inspect joins, borders, straps, and decorative pieces before the project is used or gifted.
Helpful Tips
- Use locking markers at every construction checkpoint.
- Record row and motif counts as you work.
- Keep joins and color changes relaxed enough to lie flat.
- Photograph the complete layout before final assembly.
Good lighting and a contrasting stitch marker make counting much easier. If a section looks uneven, compare the current count with the previous checkpoint before continuing. Fixing one missed stitch early is faster than compensating later, and it preserves the measurements used by the assembly instructions.

Frequently Asked Questions
Can I use fewer colors?
Yes. Alternate two jewel tones while keeping all black leading lines.
How do I prevent tangled yarn?
Use small bobbins and turn the work in the same direction after each row.
Can this become a runner?
Repeat the mirrored pane section before working the final four black rows.
Conclusion
The finished crochet stained glass cathedral placemat showcases tapestry crochet, surface crochet, color blocking, envelope border in a construction that matches the project from foundation through finishing.

Printable Crochet Pattern Card
Project: Crochet Stained Glass Cathedral Placemat
Skill level: Intermediate Hook: 4 mm Yarn: DK
Finished size: Approximately 14 inches wide by 19 inches long
Card Materials
- Approximately 260 yards black DK-weight cotton yarn
- Approximately 90 yards each ruby, sapphire, amber, and emerald DK-weight cotton yarn
- Eight locking stitch markers
- Rustproof blocking pins
- 4 mm crochet hook
- Yarn needle
- Scissors
- Tape measure
- Blocking mats and rustproof pins
Card Instructions
- Establish the Black Framework: Foundation Row: With black, ch 64. Sc in the fourth chain from the hook and across. Turn. (61 sts) Rows 1–4: Sc across in black, marking the center stitch and four 15-stitch pane sections. (61 sts) Keep every color change on the wrong side and retain two black edge stitches at both sides.
- Build the Lower Jewel Panes: Rows 5–18: Follow the marked sections in ruby, sapphire, amber, and emerald, widening each pointed pane by one stitch at both edges every second row. Work one black stitch between neighboring panes so the leading remains continuous. Count 61 stitches after every row and carry only the active neighboring color.
- Mirror the Cathedral Arches: Rows 19–44: Narrow the first pane points, open the upper mirrored panes, and reverse the color order for balanced arches. Rows 45–54: Close all four pane tips while expanding the black background between them. Rows 55–58: Work four solid black rows. (61 sts)
- Outline and Frame the Placemat: Surface-slip-stitch black along every stepped pane boundary, keeping the fabric flat. Work two black sc rounds around the panel with 3 sc in each corner, then fold the second round inward and join as an envelope edge. Wet-block to 14 by 19 inches, pinning the arches and corners square.
Finish: Check every count, weave in all ends, block to measurement, and inspect each join.
