Minerals & Gemstone 480x104
Minerals & Gemstone 480x104
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Glossary of Terms
A B C D E F G H I J K L M N O P Q R S T U V W X Y Z ALL



Variable formula
Chemical formula of a mineral that includes all common elemental replacements. For example, the mineral Adamite - Zn2(AsO4)(OH), frequently contains part of the zinc (Zn) replaced by copper (Cu) or cobalt (Co); thus its variable formula is (Zn,Cu,Co)2(AsO4)(OH). In this guide, the variable elements that are not inherent to the mineral are listed with an underline.




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