Diamonds are best known for their use in jewelry. what is another way that diamonds are useful?

Cutting, grinding, and drilling are other ways diamonds  can be used

Historians are researchers of the past or people who understand the history of people. with this field, they must possess qualities such as being unbiased, patient, efficient reader, has a knack for logic and critical thinking and reasoning, disciplined, open-minded, resourceful, with good analytical ability, good reasoning skills and problem solving!