Free pattern · Easy · Coaster

Sea Glass Coaster

Free crochet coaster pattern with chart

A granny square coaster in four shades of cotton, like sea glass on sand. Each round starts with a standing double crochet and ends with an invisible join, so there are no bumps or seams. Four rounds make a coaster about 4 1/4 inches square from about 11 yards of cotton.

Yarn: Cotton (4), four colorsabout 11 yd in all
Hook: 5 mmUS H-8
Finished: About 4 1/4 in square4 rounds

Every count checked by KrowsheaEvery round checked: 12, 24, 36 and 48 dc, with four matching corners. Modern US and UK terms, and a chart drawn from the counts.

A granny square coaster in seafoam, teal, sand and pearl cotton, rendered in Krowshea 3D Yarn — **Finished** · rendered in Krowshea 3D Yarn, not AI

Chart

Sea Glass Coaster chart

Right-handedLeft-handed

Crochet symbol chart of the sea glass coaster, drawn by Krowshea

The same chart drawn left-handed, mirrored

Reading this chart

Start at the center and read each round counterclockwise, the way a right-handed crocheter works.
Start at the center and read each round clockwise, the way a left-handed crocheter works.
Each round begins at its green mark, its first stitch or chain; its number is printed beside it. Rounds alternate dark and blue.
The key under the chart names every symbol, following the Craft Yarn Council chart standard.

Drawn by Krowshea from the checked counts. New to charts? How to read crochet charts.

Written pattern

Round by round

US termsUK terms

Written in US crochet terms

Work with the right side facing throughout. Start each round with a standing stitch, and weave in each round's tails after its invisible join.

1
seafoam Make a magic ring, 3 dc in ring, working the first dc from the loop on the hook without a beginning ch, ch 2, [3 dc in ring, ch 2] 3 times, pull the ring tight, finish with an invisible join (see Special stitches).
12 dc, 4 sps
2
tide Join tide in any corner sp, corner in same sp, making the first dc a standing dc (no beginning ch), [ch 1, corner in corner sp] 3 times, ch 1, finish with an invisible join (see Special stitches).
24 dc, 8 sps
3
sand Join sand in any corner sp, corner in same sp, making the first dc a standing dc (no beginning ch), *[ch 1, 3 dc in next sp] to next corner, ch 1, corner in corner sp; rep from * 2 more times, [ch 1, 3 dc in next sp] to next corner, ch 1, finish with an invisible join (see Special stitches).
36 dc, 12 sps
4
pearl Join pearl in any corner sp, corner in same sp, making the first dc a standing dc (no beginning ch), *[ch 1, 3 dc in next sp] to next corner, ch 1, corner in corner sp; rep from * 2 more times, [ch 1, 3 dc in next sp] to next corner, ch 1, finish with an invisible join (see Special stitches). Weave in the ends.
48 dc, 16 sps

Written in UK crochet terms

Work with the right side facing throughout. Start each round with a standing stitch, and weave in each round's tails after its invisible join.

1
seafoam Make a magic ring, 3 tr in ring, working the first tr from the loop on the hook without a beginning ch, ch 2, [3 tr in ring, ch 2] 3 times, pull the ring tight, finish with an invisible join (see Special stitches).
12 tr, 4 sps
2
tide Join tide in any corner sp, corner in same sp, making the first tr a standing tr (no beginning ch), [ch 1, corner in corner sp] 3 times, ch 1, finish with an invisible join (see Special stitches).
24 tr, 8 sps
3
sand Join sand in any corner sp, corner in same sp, making the first tr a standing tr (no beginning ch), *[ch 1, 3 tr in next sp] to next corner, ch 1, corner in corner sp; rep from * 2 more times, [ch 1, 3 tr in next sp] to next corner, ch 1, finish with an invisible join (see Special stitches).
36 tr, 12 sps
4
pearl Join pearl in any corner sp, corner in same sp, making the first tr a standing tr (no beginning ch), *[ch 1, 3 tr in next sp] to next corner, ch 1, corner in corner sp; rep from * 2 more times, [ch 1, 3 tr in next sp] to next corner, ch 1, finish with an invisible join (see Special stitches). Weave in the ends.
48 tr, 16 sps

Special stitches

Invisible join: Cut the yarn, leaving at least 15 cm (6 in) for the needle and weaving in. Pull the tail all the way through the last loop and thread it on a yarn needle. Pass the needle under both top loops of the first st of the round: skip an uncounted beginning ch; for a standing start, use the top of the standing st; if the beginning ch counts as a st, use the top ch of that beginning chain. Bring the needle back down through the top of the last st, entering its V through the back loop. Draw the tail through and adjust the new loop to match a stitch top, without tightening the round. This makes a false stitch top, not an extra st.
corner: (3 dc, ch 2, 3 dc) in the same place.
standing dc: With a slip knot on the hook, yarn over, insert the hook, yarn over and pull up a loop, [yarn over and draw through 2 loops] twice. No beginning chain.

Abbreviations (US)

ch chaindc double crochetrep repeatsp(s) space(s)st(s) stitch(es)

Special stitches

Invisible join: Cut the yarn, leaving at least 15 cm (6 in) for the needle and weaving in. Pull the tail all the way through the last loop and thread it on a yarn needle. Pass the needle under both top loops of the first st of the round: skip an uncounted beginning ch; for a standing start, use the top of the standing st; if the beginning ch counts as a st, use the top ch of that beginning chain. Bring the needle back down through the top of the last st, entering its V through the back loop. Draw the tail through and adjust the new loop to match a stitch top, without tightening the round. This makes a false stitch top, not an extra st.
corner: (3 tr, ch 2, 3 tr) in the same place.
standing tr: With a slip knot on the hook, yarn over, insert the hook, yarn over and pull up a loop, [yarn over and draw through 2 loops] twice. No beginning chain.

Abbreviations (UK)

ch chainrep repeatsp(s) space(s)st(s) stitch(es)tr treble

Materials

Yarn: Medium (4) cotton in four colors, about 11 yd (9.3 m) in all. Cotton soaks up drips and holds its shape.
Hook: 5 mm (US H-8).
Notions: Yarn needle.
Size: About 4 1/4 in (10.5 cm) square at 16 dc and 8 rows to 10 cm (4 in).

New to these stitches?

Classic granny square How to double crochet Crochet abbreviations How to read crochet charts

Seamless rounds

Standing stitches and invisible joins

Instead of a chain 3 and a slip stitch join, each round begins with a standing double crochet: the stitch is made from the loop on the hook, with no beginning chain. It ends with an invisible join: cut the yarn, pull the tail through, and sew it under the top of the first stitch so the round closes like any other stitch. Both are in the special stitches beside the pattern.

Tips

A set of coasters

Mix the order

Make four and shift the colors one round each time for a matching set.

Bigger

Add a round for a mug rug: every round is the same, with one more group along each side.

Lie flat

Wet cotton and pin it square to dry; it stays flat after.

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