Two-color diamond: C2C Graphgan Generator

A diamond that reaches the frame

This original nine-by-nine graph treats a diamond as a sequence of deliberately changing horizontal widths. Its teal rows, read from the top, contain one, three, five, seven, nine, seven, five, three and one blocks. The widest row reaches both outside edges; there is no hidden cream border beyond it. The design question is how to keep a centered picture recognizable when the crochet route follows diagonals across those horizontal rows. It is a rectangular colorwork patch, not a shaped diamond with its background cut away.

Independent count and symmetry checks

The teal widths sum to forty-one. A nine-by-nine rectangle contains eighty-one blocks, leaving forty cream blocks. Every teal coordinate lies at a horizontal-plus-vertical distance of four or less from the central cell. Reflecting either axis must reproduce the same graph. These checks are useful before yarn is involved: a misplaced point, uneven side or accidentally added margin can be found without relying on the crochet preview's appearance. There are seventeen working diagonals, and the completed blocks contain 243 dc in total, with chains and joining slip stitches counted separately.

Work through the widest color region

Use cream as yarn one and teal as yarn two. Begin with the lower-left cream block and follow the numbered coordinates, changing yarn on the last pull-through before a different color. A short teal run on one diagonal can become a longer run on the next even though the horizontal diamond narrows toward its top. Keep separate yarn supplies for disconnected cream regions rather than stretching a carried strand across the teal face. At the middle of the graph, compare the actual coordinates with the full nine-block teal row; do not turn that row into an additional horizontal crochet row.

Finish a counted practice patch

Sample several connected blocks in matching-weight smooth yarns and measure after the intended finishing method. An odd block count creates a single central cell, but it does not specify a finished centimeter measurement. Finish the final one-block diagonal, weave tails through their matching colors, and check all four points before joining the patch to another piece. A border, if desired, needs its own receiving-edge and corner instructions. It is not included in the saved eighty-one-block graph.

Common mistakes and useful questions

Why does one point look blunt?

Compare the one-block tip and the neighboring three-block row with the independent widths. Undo the first wrong color placement rather than extending the next diagonal beyond the rectangle.

Can I make this bigger by adding cream cells?

That changes the margin, not the teal diamond itself. Design and count a new bitmap if you want a larger motif; increasing a real yarn block's size also changes gauge and drape.

Are forty-one teal blocks a yarn-length estimate?

No. They are colored construction units. Measure yarn usage in an actual block sample and add separate allowances for bobbins, tails, seams and any later border.

Actual parameters and yarn budget

Use 9 blocks across and 9 high in US terms. The exact palette is yarn 1: #FFF7E9 (40 blocks); yarn 2: #0B6762 (41 blocks). These block totals describe the saved drawing, not yarn meters. A compatible block swatch is needed before estimating physical dimensions or material consumption.

Exact source and complete working instructions

Download this original graph as JSON and restore it in the C2C Graphgan Generator. Start with ch 6 and dc in the fourth, fifth and sixth chains from the hook. Each later block uses the written chain space, ch 3 and 3 dc; follow its coordinate and edge phase. In UK terminology these dc posts are tr. Read the chart-reading guide if the displayed picture and working route are unfamiliar.

Reverse the working direction once between successive diagonals. For an increase start, turn before making the new chain-six block. For a decrease start, the listed instruction already includes the turn; do not turn a second time. Follow the starting-edge action even when successive diagonals have equal block counts.

1. Diagonal 1: (1,1) color 1. Ch 6; dc in fourth, fifth and sixth chains from hook. Stop after 1 blocks; do not extend beyond the grid. Change yarn on the last pull-through before each new color. [1 blocks]
2. Diagonal 2: (2,1) color 1 → (1,2) color 1. Increase at the starting edge: ch 6, dc in fourth through sixth chains to make the first block. For each remaining listed block: sl st into the next ch-3 space, ch 3, 3 dc in that space. Stop after 2 blocks; do not extend beyond the grid. Change yarn on the last pull-through before each new color. [2 blocks]
3. Diagonal 3: (1,3) color 1 → (2,2) color 1 → (3,1) color 1. Increase at the starting edge: ch 6, dc in fourth through sixth chains to make the first block. For each remaining listed block: sl st into the next ch-3 space, ch 3, 3 dc in that space. Stop after 3 blocks; do not extend beyond the grid. Change yarn on the last pull-through before each new color. [3 blocks]
4. Diagonal 4: (4,1) color 1 → (3,2) color 1 → (2,3) color 1 → (1,4) color 1. Increase at the starting edge: ch 6, dc in fourth through sixth chains to make the first block. For each remaining listed block: sl st into the next ch-3 space, ch 3, 3 dc in that space. Stop after 4 blocks; do not extend beyond the grid. Change yarn on the last pull-through before each new color. [4 blocks]
5. Diagonal 5: (1,5) color 2 → (2,4) color 2 → (3,3) color 2 → (4,2) color 2 → (5,1) color 2. Increase at the starting edge: ch 6, dc in fourth through sixth chains to make the first block. For each remaining listed block: sl st into the next ch-3 space, ch 3, 3 dc in that space. Stop after 5 blocks; do not extend beyond the grid. Change yarn on the last pull-through before each new color. [5 blocks]
6. Diagonal 6: (6,1) color 1 → (5,2) color 2 → (4,3) color 2 → (3,4) color 2 → (2,5) color 2 → (1,6) color 1. Increase at the starting edge: ch 6, dc in fourth through sixth chains to make the first block. For each remaining listed block: sl st into the next ch-3 space, ch 3, 3 dc in that space. Stop after 6 blocks; do not extend beyond the grid. Change yarn on the last pull-through before each new color. [6 blocks]
7. Diagonal 7: (1,7) color 1 → (2,6) color 2 → (3,5) color 2 → (4,4) color 2 → (5,3) color 2 → (6,2) color 2 → (7,1) color 1. Increase at the starting edge: ch 6, dc in fourth through sixth chains to make the first block. For each remaining listed block: sl st into the next ch-3 space, ch 3, 3 dc in that space. Stop after 7 blocks; do not extend beyond the grid. Change yarn on the last pull-through before each new color. [7 blocks]
8. Diagonal 8: (8,1) color 1 → (7,2) color 1 → (6,3) color 2 → (5,4) color 2 → (4,5) color 2 → (3,6) color 2 → (2,7) color 1 → (1,8) color 1. Increase at the starting edge: ch 6, dc in fourth through sixth chains to make the first block. For each remaining listed block: sl st into the next ch-3 space, ch 3, 3 dc in that space. Stop after 8 blocks; do not extend beyond the grid. Change yarn on the last pull-through before each new color. [8 blocks]
9. Diagonal 9: (1,9) color 1 → (2,8) color 1 → (3,7) color 2 → (4,6) color 2 → (5,5) color 2 → (6,4) color 2 → (7,3) color 2 → (8,2) color 1 → (9,1) color 1. Increase at the starting edge: ch 6, dc in fourth through sixth chains to make the first block. For each remaining listed block: sl st into the next ch-3 space, ch 3, 3 dc in that space. Stop after 9 blocks; do not extend beyond the grid. Change yarn on the last pull-through before each new color. [9 blocks]
10. Diagonal 10: (9,2) color 1 → (8,3) color 1 → (7,4) color 2 → (6,5) color 2 → (5,6) color 2 → (4,7) color 2 → (3,8) color 1 → (2,9) color 1. Decrease at the starting edge: turn, slip stitch across 3 dc and into the ch-3 space; ch 3 and 3 dc in that space for the first block. For each remaining listed block: sl st into the next ch-3 space, ch 3, 3 dc in that space. Stop after 8 blocks; do not extend beyond the grid. Change yarn on the last pull-through before each new color. [8 blocks]
11. Diagonal 11: (3,9) color 1 → (4,8) color 2 → (5,7) color 2 → (6,6) color 2 → (7,5) color 2 → (8,4) color 2 → (9,3) color 1. Decrease at the starting edge: turn, slip stitch across 3 dc and into the ch-3 space; ch 3 and 3 dc in that space for the first block. For each remaining listed block: sl st into the next ch-3 space, ch 3, 3 dc in that space. Stop after 7 blocks; do not extend beyond the grid. Change yarn on the last pull-through before each new color. [7 blocks]
12. Diagonal 12: (9,4) color 1 → (8,5) color 2 → (7,6) color 2 → (6,7) color 2 → (5,8) color 2 → (4,9) color 1. Decrease at the starting edge: turn, slip stitch across 3 dc and into the ch-3 space; ch 3 and 3 dc in that space for the first block. For each remaining listed block: sl st into the next ch-3 space, ch 3, 3 dc in that space. Stop after 6 blocks; do not extend beyond the grid. Change yarn on the last pull-through before each new color. [6 blocks]
13. Diagonal 13: (5,9) color 2 → (6,8) color 2 → (7,7) color 2 → (8,6) color 2 → (9,5) color 2. Decrease at the starting edge: turn, slip stitch across 3 dc and into the ch-3 space; ch 3 and 3 dc in that space for the first block. For each remaining listed block: sl st into the next ch-3 space, ch 3, 3 dc in that space. Stop after 5 blocks; do not extend beyond the grid. Change yarn on the last pull-through before each new color. [5 blocks]
14. Diagonal 14: (9,6) color 1 → (8,7) color 1 → (7,8) color 1 → (6,9) color 1. Decrease at the starting edge: turn, slip stitch across 3 dc and into the ch-3 space; ch 3 and 3 dc in that space for the first block. For each remaining listed block: sl st into the next ch-3 space, ch 3, 3 dc in that space. Stop after 4 blocks; do not extend beyond the grid. Change yarn on the last pull-through before each new color. [4 blocks]
15. Diagonal 15: (7,9) color 1 → (8,8) color 1 → (9,7) color 1. Decrease at the starting edge: turn, slip stitch across 3 dc and into the ch-3 space; ch 3 and 3 dc in that space for the first block. For each remaining listed block: sl st into the next ch-3 space, ch 3, 3 dc in that space. Stop after 3 blocks; do not extend beyond the grid. Change yarn on the last pull-through before each new color. [3 blocks]
16. Diagonal 16: (9,8) color 1 → (8,9) color 1. Decrease at the starting edge: turn, slip stitch across 3 dc and into the ch-3 space; ch 3 and 3 dc in that space for the first block. For each remaining listed block: sl st into the next ch-3 space, ch 3, 3 dc in that space. Stop after 2 blocks; do not extend beyond the grid. Change yarn on the last pull-through before each new color. [2 blocks]
17. Diagonal 17: (9,9) color 1. Decrease at the starting edge: turn, slip stitch across 3 dc and into the ch-3 space; ch 3 and 3 dc in that space for the first block. For each remaining listed block: sl st into the next ch-3 space, ch 3, 3 dc in that space. Stop after 1 blocks; do not extend beyond the grid. Change yarn on the last pull-through before each new color. [1 blocks]