Polyhalite from Boulby mine Loftus Redcar and cleaveland North Yorkshire England
Size-
6.2cm x 4.4cm x 4cm
Weight-
122g
You will receive the item in the photo
Crystal system- Triclinic
Individual euhedral crystals are extremely rare in nature. It typically exhibits a massive granular or fibrous growth habit.
Mineral class- Sulfate
It specifically categorized as a hydrous multiple Sulfate of potassium,calcium and magnesium
Hardness- 3.5 on the MOHs scale
Rock formation- Sedimentary
It forms via evaporation of hyper-saline marine brines within vast evaporite sequences.
As ancient shallow seas dried up under hot,arid conditions, mineral salts precipitated out in successive layers.
