Carbink is a gray, rock-like Pokémon with a conical body. Its body has light blue crystals of various shapes and sizes embedded in it. A white, fluffy collar surrounds its small head. It uses this soft mane to polish the gems of other Carbink. It has bright blue eyes, a light blue crystal on top of its head, and flat diamond-shaped ears. In some media depictions, the fluffy collar, ears, and pattern of the blue crystals on the Carbink’s body can differ based on size and crystal pattern. Due to its small stature, it ties with Minior and Dwebble as the shortestRock-type.
Carbink is created from high temperatures and pressures underground and is occasionally found during cave excavations. It is known to compare its hard body with those of Geodude and Roggenrola. Following birth, it can sleep for millions of years. It is preyed upon by Sableye, and Gabite also likes to capture it. Carbink defends itself by shooting high-energy beams from the gem on its head. Rarely, Carbink will undergo a strange mutation and transform into Diancie. It is said that a pack of Carbink lives deep underground with their queen in a jeweled kingdom. Carbink can be found on occasion during the excavation of caves.
In Glittering Diancie, a group of Carbink lived in a cave near where Korrina, Gurkinn, and Diantha camped as fugitives. A thief knocked out several of the Carbink inside the cave in order to steal the prized Diancie, but just as he made it out of the cave, he was stopped by the fugitive trio and eventually defeated by Diancie.
Carbink could be based on the carbuncle, a mythical fairy-like creature that was rumored to be able to emit light and have gemstones growing out of its body. It physically resembles ores, rocks that contains minerals with important elements that are valued for a high price.