New Method for Measuring Specific Gravity

An easier method of measuring the specific gravity of objects – especially good for loose gemstones of any size.  This method uses the law of conservation of energy, is far easier to set up than the classic approach, and is very effective for tiny stones/objects.

Specific Gravity


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Chemistry for Gemmologists


GemChem is a short work on chemistry containing more than enough chemistry to give one background information on the structure of gemstones.  Hope you enjoy the work.


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George Johnstone Stoney

Bioigraphy of the namer of the electron -  Professor Queen’s College (now NUI) Galway.  Book 1 covers his early years in Birr, Trinity and Galway.

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