Tartarosite
Chemical formula: C
Tartarosite is an organic resinous substance, not recognized as a mineral, known from only one location in the world.
Description
## Characteristics Tartarosite is an organic substance, not a fully recognized mineral species. It is classified as a resinite – a fossil resin. It occurs as small, resinous masses with a yellowish coloration. It is amorphous, meaning it does not form crystals. ## Physical Properties As an amorphous substance, tartarosite does not exhibit crystallographic features typical of minerals. It is characterized by a resinous luster. Its hardness and density have not been precisely studied, but like other fossil resins, it is likely very soft and light. ## Colors and Varieties It is described as a yellowish material. No varieties are known. ## History and Name The name comes from its discovery location – the Tartare mine, near La Mure in the Isère department, France. This substance was found in a mercury mine. It is a dubious species, and its chemical formula is C₁₆H₂₂O, which confirms its organic nature. The formula "C" (carbon) given in some sources is incorrect. ## Applications Due to its extreme rarity and uncertain status, tartarosite has no practical applications. It is solely an object of interest for specialized collectors and scientists.
Diagnostic features
## Identification Its characteristic features include its resinous appearance, yellowish color, and very low density. It is an amorphous substance that does not form crystals. A key element of identification is its origin from the only known locality. ## Distinguishing from Similar Minerals It can be confused with other fossil resins, such as amber or copal. Differentiation would require advanced chemical analysis. From sulfur, which can have a similar color, it differs significantly in lower hardness, lack of crystalline structure, and the fact that as an organic substance, it will melt and burn differently. ## Crystal Forms Tartarosite is amorphous and does not form crystals. It occurs as shapeless masses and aggregates.
Geological environment
## Genesis It is a substance of organic origin – a fossil plant resin that underwent fossilization processes under specific conditions. It was found in an environment atypical for resins, within a mercury deposit. ## Mineral Associations The exact associated minerals are not described in detail, but the material comes from a mercury mine, suggesting possible co-occurrence with cinnabar, native mercury, and minerals associated with these deposits. ## Localities The only confirmed occurrence in the world is the historic Tartare mine near La Mure, Isère, France.
Rarity
Extremely rare
Collector aspects
## Quality Criteria Any authentic specimen of tartarosite from the type locality is considered extremely valuable from a scientific and collector's perspective, regardless of its size or aesthetics. Its value lies in its rarity and the possession of reference material. ## Popular Localities Specimens come exclusively from the type locality in France and are practically unavailable on the collector's market.
Care and storage
## Cleaning Specimens should only be dry-cleaned, using a soft brush to remove dust. Avoid water, especially hot water, and any detergents. ## What to Avoid Tartarosite, as an organic substance, is very sensitive to chemicals, including alcohols and solvents. It should be protected from high temperatures, which can melt or deform it, and from prolonged exposure to sunlight, which can cause fading and brittleness. ## Storage It is recommended to store specimens in a dark and cool place, in a padded box, to protect them from mechanical damage, scratching, and pressure.