Gemma is made with only one block – the Shaded 4-Patch block, which is also known as Birds in the Air, Hidden Square, and Mary’s Triangles. With 32 blocks in one colorway, 32 in the reverse, you can create this interesting design. No need to cut triangles! No need to piece triangles! The Shaded 4-Patch blocks can be easily made oversized using strip piecing methods, and then trimmed down using the Tucker Trimmer 1. Size: 40″ x 40″ The Tucker Trimmer 1™ Tool is required for this pattern, and is available below.