Create one row of normal jewels stacked almost to the top of the playfield. Allow a vertical space for only two of the three jewels in the next block to fit.. Watch the preview window for the next magic jewel block. When it appears, quickly move it to the top of the prepared stack. The magic jewel will eliminate the "touching" color jewels, and all of the remaining jewels will drop down, as will the single magic jewel that was off the playfield. This single magic jewel will drop down and eliminate another group of colored jewels.
Create one vertical column that is empty all the way to the bottom of the playfield. Watch the preview window for the next magic jewel block. Position it in a way so it falls down this column to the bottom.