Characteristics of Serpentine:

Chemical Name: Magnesium, iron, or nickel silicate

Formula: (Mg, Fe, Ni)3Si2O5(OH)4

Colors: White, grey, yellow, green, green-blue

Structure: Monoclinic

Hardness: 2.5-5.5

Specific Gravity: 2.5 - 2.6

Refractive Index: 1.56-1.57

Lustre: Subvitreous to greasy, resinous, earthy, dull

Streak: White

Locations: worldwide

What is Serpentine? 

Serpentine is not just one mineral, but a group of at least 16 white, yellowish, green, or grey-green magnesium minerals with a complex chemistry and similar appearance. Serpentine minerals generally occur as masses of tiny, intergrown crystals, and are named in allusion to their mottled appearance, which resembles a snake’s skin. Gem-quality Serpentine, often with a jade-like appearance, is cut en cabochon. Soft enough to be engraved, the mineral is also used in carvings. It is widespread, and there are huge quarrying operations in various parts of the world.