Andradite
Definition
A mineral belonging to the silicate group and the garnet subgroup, chemically composed of calcium iron silicate. This structural mineral occurs in metamorphic rocks (especially skarns and crystalline limestones) and crystallizes in dodecahedral or trapezohedral forms with shades of yellow, green, brown, or black, being highly valued in its rare varieties (such as demantoid and melanite) as a gemstone.
Bilingual Equivalents
- Andradite
- Andradite garnet
Grammatical & Source Details
| Inflection Type | Masculine noun, regular structural plural or variety variations. |
| Formation | Named in honor of the Brazilian mineralogist José Bonifácio de Andrada e Silva, using the scientific suffix '-ite'. |
| Spelling / Pronunciation | [an.dɾa.ˈdit] |
| Source | International Mineralogical Association (IMA) Database |
Contextual Usage Examples
RO: Geologul a identificat incluziuni fine de andradit în eșantioanele de rocă colectate din cariera de calcar.
EN: The geologist identified fine andradite inclusions in the rock samples collected from the limestone quarry.
RO: Varietatea verde de andradit, cunoscută sub numele de demantoid, are o dispersie a luminii superioară celei a diamantului.
EN: The green variety of andradite, known as demantoid, has a light dispersion superior to that of diamond.
RO: Structura cristalină a acestui andradit negru a fost analizată spectral pentru a determina concentrația exactă de fier.
EN: The crystal structure of this black andradite was spectrally analyzed to determine the exact concentration of iron.
Idioms & Phrases
Andradit demantoid / Demantoid andradite
RO: Varietate rară și valoroasă de culoare verde-smarald, foarte căutată în bijuterie pentru strălucirea sa intensă.
EN: A rare and valuable emerald-green variety, highly sought after in jewelry for its intense brilliance.
Sistem de cristalizare al andraditului / Andradite crystallization system
RO: Aranjament structural izometric caracteristic grupului granaților, formând de obicei cristale simetrice.
EN: An isometric structural arrangement characteristic of the garnet group, usually forming symmetrical crystals.
Skarn cu andradit / Andradite-bearing skarn
RO: Corp stâncos metamorfic bogat în silicați de calciu și fier, format la contactul dintre magmă și calcare.
EN: A metamorphic rock body rich in calcium and iron silicates, formed at the contact between magma and limestone.
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