18388 - Gemology (4 Credits)

Learning outcomes

The course of gemology aims to introduce the student to the science of precious and ornamental stones strictly linked to the science of minerals.

Course contents

Gems and gemstones: classification, genesis, main deposits.
Physical properties of gemstones: colour, specific gravity, hardness. Origin of colours.
Systematic description of gem minerals: diamond, corundum (ruby, sapphire), beryl (emerald, acquamarine), topaz, crisoberyl, opal, jade, minor gemstones (garnet, tourmaline, spinel, zircon, quartz).
Organic gems (amber, pearls).
Gems identification thru simple tools and physical properties: hardness, specific gravity, colour, etc.
Inclusions and defects in gems.
Gems cutting. Artificial gems and synthesis (verneuil, flux-based methods, hydrothermal synthesis).

Readings/Bibliography

Webster R. - Gemme, Zanichelli.
Schumann W. - Guida alle gemme del mondo, Zanichelli.
Klein C. - Mineralogia, Zanichelli.
Cipriani C. e Borelli C. - Pietre prezione, Mondadori.
Hall C. - Pietre preziose, Poligrafici Editoriale.

Any english text on the subject

Teaching methods

The course consist of lectures (3 cfu; 24 hrs) and laboratory exercises (15 hrs).

Assessment methods

The student is required to prepare a written paper on a subject assigned by the teacher plus a oral exam to assess the student degree of skill.

Teaching tools

Video projector,  crystallographic  software,  laboratory exercises.

Office hours

See the website of Giorgio Gasparotto