Pecos Diamonds

Colourful, doubly-terminated quartz crystals that occur in the Permian Seven Rivers Formation along the Pecos River valley in southeastern New Mexico.

Structural context

Quartz
Crystal System trigonalCrystal Class trigonal trapezohedralSpace Group P3121

Chemical context

Stoichiometric formulas

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