This blue and green Earthly beauty is HEMIMORPHITE and PYROMORPHITE, a rare and unique combo.
Hemimorphite is a hydrous zinc silicate with the chemical formula of Zn4Si2O7(OH)2·H2O
This zinc silicate mineral is most commonly white, clear, beige, yellow, light brown and blue. It is seldom green or yellow.
One thing that makes hemimorphite unique is that it has different crystal terminations on each side of a single crystal. This 2 faced appearance is responsible for hemimorphite’s name. Its name comes from the Greek words “hemi” (half) and “morph” (shape / form) in reference to its two different sides.
Pyromorphite is a lead chlorophosphate with the chemical formula Pb5(PO4)3Cl.
Pyromorphite also has an interesting name origin. It was first described (whatever described means.. probably means identified) in 1748, but it was not formally named until 1813.
Pyromorphite’s name comes from the Greek words “pyr” (fire) and “morphe” (shape / form) referring to the way melted pyromorphite globules become a crystalline shape upon cooling.
Pyromorphite is a member of the apatite group, along with two other minerals you’ve likely heard of… mimetite and vanadinite.
As with a number of minerals, pyromorphite’s chemical formula can be variable. This happens when an element that is not generally in the mineral’s main composition replaces one of the mineral’s main components.
Such is the case with pyromorphite and mimetite, two minerals that are often mistaken for each other.
Mimetite is a lead chloro-arsenate mineral. This case of mistaken identity can happen when the phosphate radical (PO4) may be partially replaced by an arsenate radical (AsO4).
Pyromorphite’s colors range from light to dark green, yellowish green, greenish white, brownish green, brown, orange, gray and white. It can also have coloring of a combo of green and orange.