Formula: (Fe) Ca2Fe2+Al2B[4][O|OH|(Si2O7)2, (Mg)Ca2MgAl2B[4][O|OH|(Si2O7)2], (Mn) Ca2Mn2+Al2B[4][O|OH|(Si2O7)2]
(Fe) shades of brown, violet with appropriate orientation, partially zoned with blue spots. (Mg) Delicate pinks, violets and blues, strong orange and yellow / clear color changes possible.
Hardness: 6,5-7
Density: 3,25-3,28
Refractive Index: nα = 1.672 – 1.693 nβ = 1.677 – 1.701 nγ = 1.681 – 1.704 / strong Pleochroism
Crystal System:
triclin – flat crystals similar to ax blades


The most common Axinite. Due to the flat shape, the yield of the facetable material is quite low. Occurrences often with alpine character – France, USA, Russia and above all Pakistan deliver facetable crystals.

Untreated gemstone in various shades of brown with partly strong pleochroism.

Interesting and puzzling are Pakistani axinites with deep blue spots whose cause is unknown and very attractive. Beautiful collector stone with sufficient hardness also suitable for jewelry.


In gemstone quality, the very rarely clear magnesioaxinites come from Merelani, Tanzania. This area provides with tanzanite, the Grossular variant of Merelani Mint and tsavorite and diopside gemstones stained by vanadium. Also, some of the Axinite are likely to get their color from vanadium.

Unfortunately, only a few stones are clear enough for faceting – if then rather small. Particularly beautiful are bright orange stones with a likely manganese content. Very rare and fascinating are pure blue and lavender-colored specimens, which change in the artificial light to lavender pink to pink – identical to Vietnamese spinels.

Magnesioaxinite has a high dispersion, a good hardness and would be a great stone for jewelery purposes – if it were not so rare and rather small.

Manganoaxinite plays hardly any role as pure end member parts are contained in the other axinites.

Just have a look at our collectors gem category:


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