No, you should not put a glass jar directly on the stove to warm it. Glass jars are not designed to withstand direct heat from a stove, and doing so can lead to the jar cracking, shattering, or even exploding due to thermal shock.
Glass is sensitive to rapid changes in temperature, and heating a glass jar on the stove can cause uneven expansion of the glass, leading to fractures or breakage. Additionally, if there are any imperfections or weak spots in the glass, the stress from the heat can cause the jar to fail.
If you need to warm the contents of a glass jar, it's best to transfer the contents to a heat-resistant container, such as a microwave-safe dish or a pan, and warm it using more controlled and indirect heating methods like a microwave or a water bath. If you want to warm the jar itself, you can place it in warm (not hot) water for a few minutes until the contents inside reach the desired temperature.
Always follow the manufacturer's instructions and guidelines for the safe use of glass containers, and avoid exposing them to sudden temperature changes or direct heat sources like stoves. Using appropriate methods to warm glass containers will help prevent accidents and ensure the safety of both the container and its contents.