Bustamite

An uncommon Manganese mineral with limited commercial uses, it is typically only valued by mineral collectors.

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Information about Bustamite

Bustamite is usually found in pink, reddish-brown, or pale orange hues, often with a vitreous to slightly pearly lustre. It typically forms in massive to granular habits, though well-formed crystals are rare.

When crystalline, it may appear in short prismatic or bladed forms, sometimes intergrown with minerals like rhodonite or tephroite. It’s often translucent to nearly opaque and can display subtle banding or zoning due to compositional variation.


Uses and History

Bustamite has limited commercial use but is occasionally cut as a collector’s gemstone, especially in translucent pink to reddish material. It is more commonly of interest to mineral collectors and researchers due to its association with manganese-rich metamorphic environments.

 

Bustamites type locality is the famous Franklin Mine, New Jersey, USA. It was named in 1826 for the Mexican mineralogist Miguel Bustamante y Septiem.

 


Mineralogy

Chemistry
Calcium manganese inosilicate CaMn2+Si2O6
Colours and Variations

Pale to mid pink, red, brown

Streak
White
Luster
Subvitreous, resinous
Transparency
Transparent, translucent
Fracture
Transparent, translucent
Crystal habit
Crystals are prismatic, acicular. Often cleavable massive, sometimes fibrous.
Mohs hardness
5.5 – 6.5
Fluorescence
Specific Gravity
3.32 – 3.43
Easiest testing method

Hazards and Warnings

Mineral collectors should wash their hands after handling specimens, to avoid any exposure to potential toxins.

Almost all rocks, minerals (and, frankly, almost all other substances on earth) can produce toxic dust when cutting, which can cause serious respiratory conditions including silicosis.

When cutting or polishing rocks, minerals, shells, etc, all work should be done wet to minimise the dust, and a suitable respirator or extraction system should be used.

 

 


Translations

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  • Бустамит

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  • Bustamit

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  • Bustamit

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Mandarin Chinese:

  • 钙蔷薇辉石

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Further Reading / External Links