Marjade

Marjade is a fictional gemstone commonly used in fantasy literature, video games, and some branding contexts. The name blends “sea” and “jade,” evoking a blue-green color reminiscent of jade while hinting at a maritime or magical origin. It is not a mineral recognized by real-world geology.

In most depictions marjade is translucent to opaque with a color range from pale sea-green to deep teal, often with a silvery or iridescent sheen. Descriptions vary, but fictional gemologists usually assign a hardness around 6–7 on the Mohs scale, a refractive index near 1.58–1.66, and a vitreous to silky luster. Some portray it as displaying chatoyancy or asterism in cabochon cuts, while others emphasize a soft, glowing appearance under moonlight.

In-world lore marjade is said to form in ultramafic and serpentinite-bearing crustal rocks through hydrothermal activity, with trace metals such as copper or chromium giving its characteristic color. Some authors place its origin in deep-sea vent environments, others in high-pressure metamorphic settings near subduction zones. There is no real physical source for marjade outside of fictional settings.

Uses and cultural context tag marjade primarily as a jewelry stone, carving material, or decorative element within its fictional ecosystems. In many stories, it is believed to confer protective qualities, clarity of thought, or calm to sailors, scholars, or coastal communities.

Synthesis and trade variants appear in narratives: marjade can be lab-grown via hydrothermal crystallization or high-temperature processes, with quality graded by color intensity, translucency, and surface pattern. Trade is often controlled by fictional gem guilds or regional authorities.

In real-world mineralogy, there is no recognized mineral by the name marjade.