#crystals

• Female Adamite — The feminine form for female followers of the Adamite sect, characterized by adopting the ascetic and paradisiacal lifestyle. Completely independently, in mineralogy (as a common noun), the term represents a rare secondary mineral from the arsenate class, composed of zinc arsenate hydroxide, remarkable for its brilliant yellow, green, or violet crystals that exhibit intense fluorescence under ultraviolet light.
• Adularia — A structural variety of orthoclase (potassium feldspar) presenting as transparent to translucent, colorless or whitish crystals, characterized by a specific silvery or opalescent schiller known as adularism. Named after the Adula Alps in Switzerland, where it was historically found within hydrothermal veins of metamorphic rocks. Due to its unique optical properties, fine specimens are cut as moonstones for gemology, while bulk materials are applied in high-grade ceramics and glass manufacturing.
• Aerosiderolite — A rare type of mixed meteorite, macro-structurally composed of a relatively equal mixture of silicate mass (olivine-type minerals or pyroxenes) and a metallic iron-nickel alloy. In a historical or contextual sense, the term designates celestial bodies that enter Earth's atmosphere, whose fragments collected on the ground provide precious geochemical data about early planetary core compositions.
• Argentite — A mineral from the sulfide class, composed of silver sulfide with the chemical formula Ag2S, structurally stable only at temperatures above 173°C. At ambient temperatures, it transforms through pseudomorphosis into acanthite (its stable monoclinic modification), while retaining its initial outer cubic form. Industrially, it is an extremely important silver ore, featuring a dark grey to black color, a bright metallic luster, and high density.
• Arsenolite — A rare mineral composed of arsenic trioxide (As2O3), formed by the oxidation of other arsenic-bearing minerals in the upper zones of ore deposits. Its crystals are usually cubic or octahedral, white, gray, or yellowish in color, and are characterized by a relatively high water solubility and extreme toxicity.