Green Coated Gypsum

Size: 26x12x18 cms

Weight: 3.145 kg

Location: Mexico

Product Description:

A unique mineral specimen featuring gypsum crystals coated with a vibrant green mineral, showcasing a striking contrast of colors and textures.

Geological Information:

- Location: Mexico (notably in the states of Chihuahua, Coahuila, and Durango)
- Type:
    - Gypsum (Hydrous Calcium Sulfate, CaSO₄·2H₂O)
    - Green coating: likely Celadonite (Potassium Iron Silicate, KFe²⁺₆Si₄O₁₀(OH)₂) or Chlorite
- Formation: Hydrothermal veins, sedimentary deposits, and secondary mineralization in limestone, dolostone, and other rocks
- Color:
    - Gypsum: White to transparent
    - Green coating: Vibrant green
- Hardness:
    - Gypsum: 2 on the Mohs scale
    - Green coating: 2-3 on the Mohs scale
- Crystal System:
    - Gypsum: Monoclinic
    - Green coating: Variable
- Formation Process: Hydrothermal activity and secondary mineralization resulted in the formation of gypsum crystals, followed by the precipitation of green minerals on the crystal surfaces.
- Age: Varied, from Cretaceous to Quaternary
- Occurrence: Found in limited quantities, primarily in the states of Chihuahua, Coahuila, and Durango, Mexico.
- Distinctive Features: Vibrant green coating on transparent to white gypsum crystals, creating a striking visual contrast.