Artinite

Mineral Mg2(CO3)(OH)2·3H2O

About it

Snow-white, silky sprays and tufts of needles in serpentine veins. Named for Italian mineralogist Ettore Artini; known from Italy's Val Malenco and Staten Island, New York.

Type
Mineral
Group
Carbonate (with hydroxide)
Formula
Mg2(CO3)(OH)2·3H2O
Hardness (Mohs)
2.5
Specific gravity
2–2.03
Streak
white
Lustre
silky, vitreous (glassy)
Crystal system
Monoclinic
Colours
white
Transparency
transparent, translucent
Cleavage and fracture
perfect in one direction

Typical values: real specimens vary. For more, see mindat.org.