GT100 Module 1: Coloured Gemstones


Learn about a variety of beautiful natural minerals and how gemmologists classify them. See how easy it is to identify between different gem types. Discover the attributes of gems versus mere minerals and have revealed the difference between fact and the many misconceptions which abound in this field.


There are no reviews yet.

Be the first to review “GT100 Module 1: Coloured Gemstones”