An old movie based on the future where charakters live in an utopia and have incrcrused diamonds plams of their hands that determens when they will die?

You're likely thinking of "Logan's Run" (1976).

Here's why:

* Utopia: The movie depicts a futuristic society where people live in a seemingly perfect, controlled environment.

* Diamond Palms: Characters have a "carillon" implanted in their palms that counts down to their designated "expiration date," which is set at 30 years of age. The carillon is depicted with a jeweled display.

* Death and Control: The society is built on the premise that death is controlled and necessary to maintain population balance.

While there might be other movies with elements of this, "Logan's Run" is the most iconic and closely matches your description.