Ustalono

Ustalono is a fictional mineral described in the science-fantasy setting of Valoria. It is noted for its glassy appearance that ranges from emerald to blue-green and for a faint internal glow that becomes visible under low light. In the canon, ustalono forms through slow crystallization in subduction-zone hydrothermal vents under high pressure, and it tends to crystallize in prismatic, hexagonal habits. The mineral is highlighted for its energy-related properties and thermal stability, which makes it a recurring element in portable power systems within Valorian technology.

Etymology and origin in lore: The name ustalono is attributed to the ancient Valorian language, with ustal- interpreted as a root related to endurance and durability, and the suffix -ono signifying a material class. Various in-universe texts trace its discovery to early expeditions along the Volara Rift.

Properties: In the lore, ustalono has a Mohs hardness around 6.0–6.5, a refractive index near 1.58, and displays photoluminescence that intensifies after exposure to sunlight. Its described composition is an aluminosilicate matrix with trace rare-earth elements, though exact formulations differ among sources. Reported impurities commonly include iron and titanium, which mining and refinement processes aim to minimize.

Occurrence and mining: Deposits are described as rare and geographically concentrated in the Volara Rift and adjacent basaltic formations. Mining is portrayed as technically challenging due to geothermal activity and the need for negotiations with local communities and guardians of sacred sites within the lore.

Applications and symbolism: Ustalono is portrayed as a core material for high-density energy cells and advanced optical components. Culturally, it serves as a symbol of resilience and is used in ceremonial jewelry and diplomatic gifts in Valorian society.

See also: List of fictional minerals, Valoria, photoluminescent minerals in science fiction.