Kyanite

Al2SiO5

Add one script tag to your page:

<div data-mineralfyi="entity" data-slug="kyanite"></div>
<script src="https://cdn.jsdelivr.net/npm/mineralfyi-embed@1/dist/embed.min.js" defer></script>

Embed as an iframe:

<iframe src="https://mineralfyi.com/iframe/entity/kyanite/?style=modern&theme=light" width="420" height="400" frameborder="0" loading="lazy" style="border:0;border-radius:10px;max-width:100%"></iframe>

Paste the URL in WordPress, Medium, or Ghost:

https://mineralfyi.com/mineral/kyanite/

Shields.io-compatible SVG badge:

Kyanite badge ![Kyanite](https://mineralfyi.com/badge/entity/kyanite.svg)

Web Component:

<mineralfyi-entity slug="kyanite"></mineralfyi-entity>
<script src="https://cdn.jsdelivr.net/npm/mineralfyi-embed@1/dist/embed.min.js" defer></script>

Kyanite is remarkable for having variable hardness depending on crystal direction — 4.5 parallel to the length and 7 across. It is an important metamorphic index mineral indicating high-pressure conditions. Its blue color makes it a minor gemstone.

Crystal System Triclinic
Mineral Class 09 Silicates
Mohs Hardness 4.5-7.0
Specific Gravity 3.53-3.65
Color Blue, white, gray, green
Luster Vitreous
Streak Colorless
Cleavage Perfect {100}
Fracture Splintery
Transparency Translucent
Crystal Habit Bladed, columnar

Mohs Hardness

Mohs Hardness: 4.5 – 7.0
1 Soft10 Hard

Crystal System

Triclinic

Frequently Asked Questions

What is the hardness of Kyanite?
Kyanite has a Mohs hardness of 4.5-7.0.
What crystal system does Kyanite belong to?
Kyanite crystallizes in the Triclinic crystal system.
What color is Kyanite?
Kyanite is typically Blue, white, gray, green.
What type of luster does Kyanite have?
Kyanite exhibits a Vitreous luster.
What is the chemical formula of Kyanite?
The chemical formula of Kyanite is Al2SiO5.