Scientific and Technical
	Commercial Names vs. Mineralogical Names  by Peter J Clark, from original work by Walter Schumman and Evelyne Stern A table of some common commercialised gemstone misnomers
For beginners
	Terminology  by Peter J Clark A quick definition of some often confusing terms
	The Complete Glossary of Terms  by Peter J Clark A comprehensive glossary of words, phrases, terms and other jargon that would otherwise baffle…
Seasonal gemstones
	Stones of the Planets  by Peter J Clark A listing of those gemstones traditionally associated with the bodies of our solar system.
	Stones of the Year  by Peter J Clark A listing of those gemstones traditionally associated with the months of the year.
	Stones of the Zodiac  by Peter J Clark A listing of those gemstones traditionally associated with the signs of the zodiac.