Ametyst

Structural context

Quartz
Crystal System trigonalCrystal Class trigonal trapezohedralSpace Group P3121

Chemical context

Stoichiometric formulas

Ametyst
mindat.org
  • March 13, 2023SiO2
Quartz
mindat.org
  • March 13, 2023SiO2
IMA
  • March 13, 2023SiO2
mineralogy.rocks
  • Aug. 30, 2022SiO2

Physical properties

ColorColor entities, recognized using a custom trained NER model
  • colorless
  • rose
                  Color noteOriginal color note from the source
                  Colorless, purple, rose, red, black, yellow, brown, green, blue, orange, etc.
                  StreakStreak entities, recognized using a custom trained NER model
                    Streak noteOriginal streak note from the source
                    White
                    Lustre
                    Vitreous
                    Fracture
                    Conchoidal
                    Transparency
                    Transparent
                    Translucent
                    Luminescence
                    Triboluminescent
                    Tenacity
                    brittle
                    Hardness
                    7
                    Measured density
                    2.65—2.66
                    Calculated density
                    2.66