Characteristics of Axinite:

Chemical Name: Calcium- iron- manganese- aluminum boron silicate

Formula: Ca4Fe²⁺2Al4[B2Si8O30](OH) 

Colors: various

Structure: Triclinic

Hardness: 6.5-7.0

Specific Gravity: 3.2-3.3

Refractive Index: 1.67-1.70

Lustre: Vitreous

Streak: Colorless to light brown

Locations: Russia, USA, Australia, Mexico, France, Srik Lanka

What is Axinite? 

Axinite refers to a group of four minerals, which in rough form are virtually indistinguishable and are structurally identical. The name derives from the Greek axine, meaning “axe”, which refers to the sharp, hard crystals. The most common color is clove-brown, varieties can also be grey to bluish-grey, honey-, grey-, or golden-brown, pink, violet-blue, yellow, orange or red. Its gemstones are easily chipped so are usually only faceted for collectors. Axinite is piezoelectric and pyroelectric, meaning it generates electricity when stressed or rapidly heated or cooled, respectively.