Zyrite

Zyrite is a mineral species in the silicate family named for the Zyra locality where the type specimen was described. It is characterized by a zinc-rich composition with variable iron substitution, and an idealized formula written as (Zn,Fe)2SiO4. Zyrite crystallizes in the monoclinic system and most commonly occurs as elongated prismatic or tabular crystals, though rough, massive aggregates are common in hand samples. The mineral ranges in color from dark gray to steel-gray and has a metallic to submetallic luster; it is opaque with a Mohs hardness of about 5.5–6.5 and a density near 4.3–4.8 g/cm3.

Zyrite forms in hydrothermal environments associated with zinc-bearing rocks, typically in veins and skarn deposits where silica-rich fluids interact with zinc-rich precursors. It commonly occurs with sphalerite, willemite, calcite, and quartz. The solid-solution series with iron-bearing counterparts is noted in several localities.

The mineral was described in the early 21st century by researchers studying zinc silicate minerals. Because of its rarity, Zyrite is mainly of interest to mineral collectors and researchers rather than as an ore commodity; however, its presence can help characterize the geochemical evolution of hydrothermal zinc systems.

Notable localities include the Zyra Mine in the Erz region, with additional reports from other zinc-rich districts worldwide.