Arms are an alloy of gold and platinum, and legs are made of agate. The alloy in the arms can be reshaped at will. Originally possessed a bright personality, but is currently calm and cold. Currently, one-third of the body is no longer gemstone. Called 'Phos' by other Gems. Part of the battle squad. Hardness: 3.5

Gentle personality and loves stories about romance. Has thick eyebrows and rainbow-colored hair, wearing white thigh-high socks and long gloves. Born in the same year as Cinnabar. According to those around, Diamond is considered exceptionally beautiful even among the Gems. Partnered with Bort. Hardness: 10

The strongest Gem after Master Kongō. A battle maniac with a rough personality who always looks angry. As the strongest Gem excluding Master Kongō, Bort is primarily assigned to the battle squad. Highly bellicose, earning the awe and respect of other Gems. A diamond variety. Hardness: 10

A Gem characterized by semi-long red hair who lives in the Void. Silver poison liquid constantly emanates from the body, which can be used to collect faint light to remain active at night. However, the poison is uncontrollable and affects other Gems, making it impossible to stay close to others. Personality: Tsundere

A Gem characterized by a blue short-cut hairstyle, in charge of patrols. Usually called by the nickname 'Benito' by other Gems.

In charge of medical affairs among the Gems. Based on mentions from others, Rutile was originally part of a patrol pair, but seems to have become a doctor to treat their partner after they fell into a long sleep.

In charge of clothing. Loves dressing up, so their hairstyle changes every day. Usually wears hair ornaments. Since all Gem outfits are based on Red Beryl's designs, they sometimes throw a tantrum if a Gem's style or physique changes, insisting on re-measuring them.

The current guardian and teacher of the Gems, appearing as a sturdy monk who is much taller than the other Gems. Usually referred to as 'Master' or 'Sensei' by the Gems.

A Gem of similar age to Yellow Diamond, the oldest among them, and evaluated as the strongest after Bort. Born with numerous holes in the body, Padparadscha is almost always asleep. Moving requires filling the holes with other minerals, but the periods of being unable to wake up are growing longer.

Hunters who descend from the moon in the form of Buddha statues. They attack with spears and bows made from processed Gems. Their cross-sections strangely resemble lotus roots, and they vanish into smoke when taking sufficient damage. However, they are not completely destroyed and reappear from the moon days later. They do not appear at night or on rainy days. They manifest as black spots in the sky.