Axinite-(Fe) is a gem that is notably rare is generally intensely trichroic with brown and purple colors being dominant. Axinite-(Fe) is the iron analog of Axinite-(Mg) which may be the Magnesium analog. It’s difficult to get material without internal flaws and feathers. Inspite of the inclusions, Axinite is really a gem that is magnificent of its rich colors and brilliance.

There are many localities for Axinite-(Fe), even for fine crystals. On Roscommon Cliff as well as in the Botallack mine, St. Just, Cornwall, England. From Bourg d’Oisans, Isère, France. In the Maderantal, Uri, Switzerland. Extraordinary crystals through the Puiva deposit, about 100 km west-northwest of Saranpaul, Subpolar Ural Mountains; at Zlatoust, Ural Mountains; and elsewhere in Russia. At Skardu, Pakistan. In the Obira mine, Bungo, Oita Prefecture; the Toroku mine, Miyazaki Prefecture; and elsewhere in Japan. In the USA, from Coarse Gold, Madera County, near Yreka, Siskiyou County, and brand new Melones Lake, Calaveras County, Ca; and from Elkhorn, Jefferson County, Montana. In Canada, found near Hope, British Columbia, and within the Moneta mine, Timmins, Ontario. From Trinidad, Baja California, Mexico. At Vitoria da Conquista, Bahia, Brazil.

Chemical Formula: Ca2Fe2+Al2(BO3)Si4O12(OH)
Calcium Iron Aluminum Boron Sorosilicate Hydroxide
Molecular Weight: 570.12 gm
Composition: Calcium 14.06 % Ca 19.67 % CaO
Aluminum 9.47 % Al 17.88 % Al2O3
Iron 9.80 % Fe 12.60 % FeO
Silicon 19.71 % Si 42.16 % SiO2
Boron 1.90 % B 6.11 % B2O3
Hydrogen 0.18 % H 1.58 % H2O
Oxygen 44.90 % O
  100.00 % 100.00 % = TOTAL OXIDE


Cleavage: Distinct on {100}, Poor on {001} and {110}
Fracture: Irregular/Uneven to Conchoidal
Tenacity: Brittle
Moh’s Hardness: 6.5 – 7.0
Density: 3.25 – 3.28 (g/cm3)
Luminescence: None
Radioactivity: Not Radioactive


Color: Brown, Purplish blue, Gray, Greenish yellow
Transparency: Transparent to Subtransparent
Luster: Vitreous (Glassy)
Refractive Index: 1.672 – 1.701  Biaxial ( – )
Birefringence: 0.0090 – 0.0110
Dispersion: Strong, r < v
Pleochroism: X = colorless, yellow, light brown, yellow brown, or pale green; Y = colorless, deep yellow, deep blue, pale violet, or violet; Z = colorless, pale green, olive yellow, brown, or dark violet