Kylindros

Kylindros is a fictional mineral described in worldbuilding literature and role-playing game materials as a rare silicate crystalline substance found in hydrothermal veins within basaltic rock of the fictional continent Eldara. The name is often attributed to an ancient dialect and a common mineral suffix, and it has become a recurring element in speculative geology and fantasy lore.

Appearance and properties: It forms slender prismatic crystals with a blue-green to teal hue. Its surface exhibits a fine iridescent sheen caused by micro-inclusions of titanium and vanadium. Under ultraviolet light it glows pale violet, making it recognizable in dim caves. On the Mohs scale it is rated around 6, and the crystals take a high polish, displaying subtle chatoyancy.

Occurrence and origin: Reports place kylindros in geothermally active belts where basaltic magma interacts with silica-rich fluids. First described in fictional texts by explorer Leora Mirth in the 19th century, kylindros has since featured in multiple worldbuilding guides as a rare mineral of regional importance.

Uses and symbolism: In stories and games, kylindros is valued for jewelry, ornamental inlays, and as a symbolic focus in magical or alchemical systems. Its rarity and distinctive glow make it a common plot element in treasure narratives and exploration quests.

Etymology: The term kylindros combines elements from in-world languages and mineral-naming conventions, with kyl- suggesting radiance or circle and -indros serving as a conventional mineral suffix.