Speglun

Speglun is a fictional mineral that appears in various fantasy and science fiction works. Because there is no single canonical definition, its properties and role differ by author, but it is commonly depicted as a luminous crystal with energy-related abilities.

Typically, speglun crystals are described as translucent to pale opalescent, often with a blue or silver sheen. In many stories, speglun is prized for its capacity to store or transmit energy and is used to power ancient machines, artifacts, or starship reactors. The mineral is often said to respond to specific frequencies of light or sound, enabling controlled release of its stored energy.

Geology and occurrence within fictional settings place speglun in deep crustal environments or as a byproduct of long-extinct civilizations. It is usually found in veins within basalt or quartz and is considered extremely rare and valuable. Some narratives treat speglun as a catalyst that enables magical or technological effects, while others emphasize its role as a strategic resource.

Cultural and economic roles vary, but speglun commonly drives quest plots, factional power struggles, and trade networks. In many works, specialists study speglun to unlock its potential, while scavengers and smugglers seek to exploit its scarcity.

Origin of the name also varies by work; some authors link speglun to terms meaning mirror or reflection because of its reflective appearance, while others present it as a purely invented proper noun. In any case, speglun serves as a versatile device for worldbuilding in speculative fiction.