Amethyst
Amethyst is a silicate mineral recognized for its hardness and durability, with notable Chinese occurrences.
About Amethyst
Amethyst is a silicate mineral in the silica group and has the chemical formula SiO₂. It crystallizes in the trigonal system and ranks among the harder species, with lasting durability. Its combination of structural character and global distribution make it a recognized species in both systematic and aesthetic collections.
Identification & care
Amethyst typically forms prismatic, pyramidal, scepter, phantom; geodes; clusters. Its color is typically violet to purple. The luster is vitreous, the streak is white, and specimens range from transparent to translucent.
Collector context
How it forms
The geological setting for Amethyst is typically hydrothermal; volcanic rock cavities (geodes); pegmatites. It is commonly found in association with quartz, calcite, agate.
Classic Chinese localities
Documented Chinese occurrences are recorded at Huanggang Fe-Sn deposit, among others.
Why collectors care
Collectors pursue Amethyst for the clarity of its crystal form and, in good material, saturated color that reads instantly across a display case. A well-terminated amethyst on clean matrix photographs well, identifies quickly, and anchors a cabinet piece. Top Chinese specimens over the last two decades have reset the bar for what amethyst looks like at collector grade.
What affects value
Value in Amethyst is assessed, in typical order of weight, against: (1) locality provenance; (2) size relative to the species norm; (3) crystal form and termination sharpness; (4) color saturation and zoning; (5) transparency and internal clarity; (6) matrix quality and aesthetic balance; (7) condition (absence of damage, chips, or repair). Cleaning quality and verified locality documentation act as multipliers across the above.
Naming history
The name Amethyst has a specific etymological and historical context — see Mindat's reference entry for provenance details. We have retained naming data at the record level; published prose is paraphrased from factual fields rather than copied from source.
