Here are two patterns for sewing elegant-shaped pears. They could be made out of silk, cotton, tapestry/upholstery fabric, canvas, etc.
I can't think of any fabric that could not be used on these pears. After cutting out the pieces, you could embroider them or paint or tint them before sewing them together. You could even bead them.
As you know, there are almost no more rules when it comes to decorating or sewing. Pears can be turquoise, pink, green, orange, polka-dot, plaid, print, geometric, etc. You can clip and turn the seams inside, press them apart or to the side. If the fabric is heavy, why not sew them with the seams on the outside. That would be different and clever, and somewhat primitive, especially if you roughed up the seam allowances on the outside.
Different sizes and shapes are represented here. You could always enlarge or reduce the size of the patterns if you wanted to make bowl fillers, gifts, or one large one as a statement with an interesting stem with some fabulous yarn, ribbons, leaves and trimmings.