yes
Diamonds are harder than chalk.
Diamonds are minerals, composed of the element carbon.
Diamonds are formed from carbon, which is a mineral.
Diamonds are pure carbon.
Diamonds are formed from carbon.
diamonds
Diamonds are composed of carbon atoms arranged in a specific crystal structure. Pure diamonds are made entirely of carbon with no other minerals present.
Diamonds formed from carbon in the lab, are diamonds formed from the mineral carbon.
Mined diamonds are elements -- minerals. Man-made diamonds can be fabricated out of carbon.
Chalk.
Lab-grown diamonds have the same chemical composition and crystal structure as natural diamonds, but they are not considered minerals because they are not formed through natural geological processes. Minerals are naturally occurring inorganic substances with a specific chemical composition and crystal structure.
Hundreds of minerals are found in Brazil, from diamonds to topaz to quartz.