Ulnarne

Ulnarne is a fictional mineral described in speculative geoscience literature as a rare phosphate-silicate mineral. In the imagined geology of the Velorian continent, it forms during high-grade regional metamorphism of carbonate rocks and is typically found in skarn deposits. Crystallites are described as prismatic, and the mineral is noted for a color range from deep blue to emerald green, a vitreous to adamantine luster, and a Mohs hardness around 6. It is said to occur as vein fillings within metamorphic rocks and to be commonly associated with calcite, sphalerite, and garnet.

Etymology and discovery: The name ulnarne is said to derive from the Ulnar Range, a fictional mountainous region where the mineral was first described by geologist Ilya Noren and colleagues in 2044. The suffix -arne is part of a fictional mineral-naming convention used in this literary context.

Composition and properties: Ulnarne is described as chemically complex, with silicate and phosphate components and trace rare earth elements. Its exact composition varies by deposit, and no standardized formula exists in the fictional corpus. The mineral is highlighted in narratives for its potential to host rare elements under metamorphic conditions.

Occurrence and locality: In the fiction, notable localities include the Twilight Basin of the Ulnar Range and the neighboring Silvercrest Belt. Economic significance is speculative, as no real-world mining exists; however, it is often depicted as suitable for ornamental gemstones and proposed as a source of select rare earth components in storyworld economies.

In fiction and scholarship: Ulnarne serves as a case study in speculative mineralogy, illustrating metamorphic differentiation and the use of nomenclature in world-building.