Do not stretch bands containing stones. It can weaken the areas between or under stones and lead to stone loss.
This platinum band is set with baguette and round diamonds. Stretching will increase the spaces between the stones and distort the supporting walls. As a result, the diamonds will become loose in their channels, and may even fall out.
This platinum band also has openings below the diamonds on the inside of the band that will not hold their shapes if subjected to stretching. They will pull, tear, and possibly break.
This platinum band features flush set diamonds in its surface. Setting the diamonds required making drill holes and using burs to open them for stone setting. The random pattern and stone layout resulted in openings that do not allow the band to stretch uniformly. The narrower areas would pull away and break if subjected to stretching.