|Chrysoberyl / クリソベリル|
|Status||Inactive prior to beginning of the story|
They have long straight honey-colored hair parted to their right, reaching their waist.
As revealed in the artbook, they were an honor student.
- Mineral: oxide
- Chemistry: BeAl2O4
- Color: yellowish-green to translucent.
The mineral or gemstone chrysoberyl is an aluminate of beryllium. Despite the similarity of their names, chrysoberyl and beryl are two completely different gemstones, although they both contain beryllium. Chrysoberyl is the third-hardest frequently encountered natural gemstone and lies at 8.5 on the hardness scale, between corundum (9) and topaz (8).
Ordinary chrysoberyl is yellowish-green and transparent to translucent. When the mineral exhibits good pale green to yellow color and is transparent, then it is used as a gemstone. The three main varieties of chrysoberyl are ordinary yellow-to-green chrysoberyl, cat's eye or cymophane, and alexandrite.