The mineral identity (species, possibly variety):
The standard reference used is Fleischer's Glossary of Mineral Species, published by the Mineralogical Record Press. (The 2008 edition is marred by a controversial decision by the IMA that renamed many common minerals, including those in the apatite mineral group; the decision has now been reversed, so some mineral names are already outdated.)
I tend to use variety names when they are available, such as:
Beryl, variety Emerald
Beryl, var. Emerald
Beryl v. Emerald
Beryl, var. Emerald
Beryl v. Emerald
The next item, when present, is the Mineral Formula. You can use words:
beryllium aluminum silicate
or the chemical formula:Be3Al2Si6O18
I usually do not include additional chemical information true for the variety in the formula (such as the presence of Cr and/or V in emerald); I put that information in the comments field, if anywhere.
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