The Specific Gravity of Gemstones

Step into the scientific world of gemstone identification with this fascinating collection of historical gemological articles, carefully curated from early 20th-century and earlier sources for today's readers.

Focusing on one of the most essential physical tests in gemology, specific gravity measurement, the volume explains the classic methods used to determine a gemstone's density relative to water, illustrating how this property can help distinguish between different gem materials and support broader gemstone testing.

Contents include:

• Gem Testing by B. W. Anderson
• Gemstones by G. F. Herbert
• A Text Book of Mineralogy by Edward Salisbury Dana
• Gems and Gem Material by Edward Henry Kraus
• Practical Gemmology by Robert Webster
• Gem Stones and Their Distinctive Characters by G. F. Herbert Smith

With original texts and expert context preserved in an accessible modern edition, this book is a valuable and engaging reference for gem enthusiasts, students, collectors and anyone curious about the foundational techniques of gemstone testing and identification.