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GARNETS

Miscellaneous

• Family: None
• Region: None
• Mined At: Unspecified
• Raw Mineral: Yes
• Generic: No

Notes

(Richard Willis)

Variable silicate forms of Mg, Fe, Ca, Al, Cr, V, Mn, Ti, Zr, Y, etc.
Garnets are silicates common to feldspathic magma rocks, such as pegmatites in general. Garnet powders are excellent materials for glazes, usually requiring no more additions than fluxes to bring them to melt at desired temperatures. For example, equal dry-weight parts of vegetable ash and garnet will glaze out at 1200-1300ºC. Add to this an appropriate binder and one has a handle-able adhesive covering.
Hardness: 6.5-7.5 Density: 3.4-4.6 Solubility according to variety
common varieties
— almandine Fe₃Al₂(SiO₄)₃
— kimzeyite Ca₃Zr₂(Al₂SiO₁₂)
— andradite Ca₃Fe₂³⁺⁺⁺(SiO₄)₃
— knorringite (Ca, Mg)₃Cr₂(SiO₄)₃
— calderite Mn₃Fe₂(SiO₄)₃
— majorite Mg₃(Fe, Si₂(SiO₄)₃
— demantoid Ca₃Al₂(SiO₄)₃
— pyropo Mg₃Al₂(SiO₄)₃
— goldmanite CaV₂³⁺⁺⁺(SiO₄)₃
— skiagite Fe₃²⁺⁺Fe₂³⁺⁺⁺(SiO₄)₃
— grossularite Ca₃Al₂(SiO₄)₃
— spesartine Mn₃Al₂(SiO₄)₃
— hessonite Ca₃Al₂(SiO₄)₃
— uvarovite Ca₃Cr₂(SiO₄)₃

Authors

• Richard Willis (Owner)

Pictures

• Garnet Black

  

• Garnet Red

  

• Garnet Rose

  

XML

<?xml version="1.0" encoding="UTF-8"?>
<material name="GARNETS" descrip="" generic="0" rawmineral="1" searchkey="" loi="0.00">
<notes>
<note>Variable silicate forms of Mg, Fe, Ca, Al, Cr, V, Mn, Ti, Zr, Y, etc.&lt;BR&gt;
Garnets are silicates common to feldspathic magma rocks, such as pegmatites in general. Garnet powders are excellent materials for glazes, usually requiring no more additions than fluxes to bring them to melt at desired temperatures. For example, equal dry-weight parts of vegetable ash and garnet will glaze out at 1200-1300&amp;ordm;C. Add to this an appropriate binder and one has a handle-able adhesive covering.&lt;BR&gt;
Hardness: 6.5-7.5 Density: 3.4-4.6 Solubility according to variety&lt;BR&gt;
&lt;B&gt;common varieties&lt;/B&gt;&lt;BR&gt;
&amp;#151; almandine Fe&lt;FONT SIZE=2&gt;&lt;SUB&gt;3&lt;/SUB&gt;&lt;/FONT&gt;Al&lt;FONT SIZE=2&gt;&lt;SUB&gt;2&lt;/SUB&gt;&lt;/FONT&gt;(SiO&lt;FONT SIZE=2&gt;&lt;SUB&gt;4&lt;/SUB&gt;&lt;/FONT&gt;)&lt;FONT SIZE=2&gt;&lt;SUB&gt;3&lt;/SUB&gt;&lt;/FONT&gt;&lt;BR&gt;
&amp;#151; kimzeyite Ca&lt;FONT SIZE=2&gt;&lt;SUB&gt;3&lt;/SUB&gt;&lt;/FONT&gt;Zr&lt;FONT SIZE=2&gt;&lt;SUB&gt;2&lt;/SUB&gt;&lt;/FONT&gt;(Al&lt;FONT SIZE=2&gt;&lt;SUB&gt;2&lt;/SUB&gt;&lt;/FONT&gt;SiO&lt;FONT SIZE=2&gt;&lt;SUB&gt;12&lt;/SUB&gt;&lt;/FONT&gt;)&lt;BR&gt;
&amp;#151; andradite Ca&lt;FONT SIZE=2&gt;&lt;SUB&gt;3&lt;/SUB&gt;&lt;/FONT&gt;Fe&lt;FONT SIZE=2&gt;&lt;SUB&gt;2&lt;/SUB&gt;&lt;SUP&gt;3+++&lt;/SUP&gt;&lt;/FONT&gt;(SiO&lt;FONT SIZE=2&gt;&lt;SUB&gt;4&lt;/SUB&gt;&lt;/FONT&gt;)&lt;FONT SIZE=2&gt;&lt;SUB&gt;3&lt;/SUB&gt;&lt;/FONT&gt;&lt;SUB&gt;&lt;BR&gt;
&lt;/SUB&gt;&amp;#151;&lt;SUB&gt; &lt;/SUB&gt;knorringite (Ca, Mg)&lt;FONT SIZE=2&gt;&lt;SUB&gt;3&lt;/SUB&gt;&lt;/FONT&gt;Cr&lt;FONT SIZE=2&gt;&lt;SUB&gt;2&lt;/SUB&gt;&lt;/FONT&gt;(SiO&lt;FONT SIZE=2&gt;&lt;SUB&gt;4&lt;/SUB&gt;&lt;/FONT&gt;)&lt;FONT SIZE=2&gt;&lt;SUB&gt;3&lt;/SUB&gt;&lt;/FONT&gt;&lt;SUB&gt;&lt;BR&gt;
&lt;/SUB&gt;&amp;#151; calderite Mn&lt;FONT SIZE=2&gt;&lt;SUB&gt;3&lt;/SUB&gt;&lt;/FONT&gt;Fe&lt;FONT SIZE=2&gt;&lt;SUB&gt;2&lt;/SUB&gt;&lt;/FONT&gt;(SiO&lt;FONT SIZE=2&gt;&lt;SUB&gt;4&lt;/SUB&gt;&lt;/FONT&gt;)&lt;FONT SIZE=2&gt;&lt;SUB&gt;3&lt;/SUB&gt;&lt;/FONT&gt;&lt;SUB&gt;&lt;BR&gt;
&lt;/SUB&gt;&amp;#151;&lt;SUB&gt; &lt;/SUB&gt;majorite Mg&lt;FONT SIZE=2&gt;&lt;SUB&gt;3&lt;/SUB&gt;&lt;/FONT&gt;(Fe, Si&lt;FONT SIZE=2&gt;&lt;SUB&gt;2&lt;/SUB&gt;&lt;/FONT&gt;(SiO&lt;FONT SIZE=2&gt;&lt;SUB&gt;4&lt;/SUB&gt;&lt;/FONT&gt;)&lt;FONT SIZE=2&gt;&lt;SUB&gt;3&lt;/SUB&gt;&lt;/FONT&gt;&lt;SUB&gt;&lt;BR&gt;
&lt;/SUB&gt;&amp;#151; demantoid Ca&lt;FONT SIZE=2&gt;&lt;SUB&gt;3&lt;/SUB&gt;&lt;/FONT&gt;Al&lt;FONT SIZE=2&gt;&lt;SUB&gt;2&lt;/SUB&gt;&lt;/FONT&gt;(SiO&lt;FONT SIZE=2&gt;&lt;SUB&gt;4&lt;/SUB&gt;&lt;/FONT&gt;)&lt;FONT SIZE=2&gt;&lt;SUB&gt;3&lt;/SUB&gt;&lt;/FONT&gt;&lt;SUB&gt;&lt;BR&gt;
&lt;/SUB&gt;&amp;#151; pyropo Mg&lt;FONT SIZE=2&gt;&lt;SUB&gt;3&lt;/SUB&gt;&lt;/FONT&gt;Al&lt;FONT SIZE=2&gt;&lt;SUB&gt;2&lt;/SUB&gt;&lt;/FONT&gt;(SiO&lt;FONT SIZE=2&gt;&lt;SUB&gt;4&lt;/SUB&gt;&lt;/FONT&gt;)&lt;FONT SIZE=2&gt;&lt;SUB&gt;3&lt;/SUB&gt;&lt;/FONT&gt;&lt;SUB&gt;&lt;BR&gt;
&lt;/SUB&gt;&amp;#151; goldmanite CaV&lt;FONT SIZE=2&gt;&lt;SUB&gt;2&lt;/SUB&gt;&lt;SUP&gt;3+++&lt;/SUP&gt;&lt;/FONT&gt;(SiO&lt;FONT SIZE=2&gt;&lt;SUB&gt;4&lt;/SUB&gt;&lt;/FONT&gt;)&lt;FONT SIZE=2&gt;&lt;SUB&gt;3&lt;/SUB&gt;&lt;/FONT&gt;&lt;SUB&gt;&lt;BR&gt;
&lt;/SUB&gt;&amp;#151; skiagite Fe&lt;FONT SIZE=2&gt;&lt;SUB&gt;3&lt;/SUB&gt;&lt;SUP&gt;2++&lt;/SUP&gt;&lt;/FONT&gt;Fe&lt;FONT SIZE=2&gt;&lt;SUB&gt;2&lt;/SUB&gt;&lt;SUP&gt;3+++&lt;/SUP&gt;&lt;/FONT&gt;(SiO&lt;FONT SIZE=2&gt;&lt;SUB&gt;4&lt;/SUB&gt;&lt;/FONT&gt;)&lt;FONT SIZE=2&gt;&lt;SUB&gt;3&lt;/SUB&gt;&lt;/FONT&gt;&lt;SUB&gt;&lt;BR&gt;
&lt;/SUB&gt;&amp;#151; grossularite Ca&lt;FONT SIZE=2&gt;&lt;SUB&gt;3&lt;/SUB&gt;&lt;/FONT&gt;Al&lt;FONT SIZE=2&gt;&lt;SUB&gt;2&lt;/SUB&gt;&lt;/FONT&gt;(SiO&lt;FONT SIZE=2&gt;&lt;SUB&gt;4&lt;/SUB&gt;&lt;/FONT&gt;)&lt;FONT SIZE=2&gt;&lt;SUB&gt;3&lt;/SUB&gt;&lt;/FONT&gt;&lt;SUB&gt;&lt;BR&gt;
&lt;/SUB&gt;&amp;#151; spesartine Mn&lt;FONT SIZE=2&gt;&lt;SUB&gt;3&lt;/SUB&gt;&lt;/FONT&gt;Al&lt;FONT SIZE=2&gt;&lt;SUB&gt;2&lt;/SUB&gt;&lt;/FONT&gt;(SiO&lt;FONT SIZE=2&gt;&lt;SUB&gt;4&lt;/SUB&gt;&lt;/FONT&gt;)&lt;FONT SIZE=2&gt;&lt;SUB&gt;3&lt;/SUB&gt;&lt;/FONT&gt;&lt;SUB&gt;&lt;BR&gt;
&lt;/SUB&gt;&amp;#151; hessonite Ca&lt;FONT SIZE=2&gt;&lt;SUB&gt;3&lt;/SUB&gt;&lt;/FONT&gt;Al&lt;FONT SIZE=2&gt;&lt;SUB&gt;2&lt;/SUB&gt;&lt;/FONT&gt;(SiO&lt;FONT SIZE=2&gt;&lt;SUB&gt;4&lt;/SUB&gt;&lt;/FONT&gt;)&lt;FONT SIZE=2&gt;&lt;SUB&gt;3&lt;/SUB&gt;&lt;/FONT&gt;&lt;SUB&gt;&lt;BR&gt;
&lt;/SUB&gt;&amp;#151;&lt;SUB&gt; &lt;/SUB&gt;uvarovite Ca&lt;FONT SIZE=2&gt;&lt;SUB&gt;3&lt;/SUB&gt;&lt;/FONT&gt;Cr&lt;FONT SIZE=2&gt;&lt;SUB&gt;2&lt;/SUB&gt;&lt;/FONT&gt;(SiO&lt;FONT SIZE=2&gt;&lt;SUB&gt;4&lt;/SUB&gt;&lt;/FONT&gt;)&lt;FONT SIZE=2&gt;&lt;SUB&gt;3&lt;/SUB&gt;&lt;/FONT&gt;&lt;BR&gt;

</note>
</notes>
<pictures>
<picture description="Garnet Black" filename="garnet_black.jpg"/>
<picture description="Garnet Red" filename="garnet_red.jpg"/>
<picture description="Garnet Rose" filename="garnet_rose.jpg"/>
</pictures>
</material>

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