The Spanish Gem Academy (SGA) offers accredited World Gem Foundation practical coloured gemstone grading courses. Earn credits towards your Career Gemmologist and Coloured Gemstone Professional Diplomas. In this six-day workshop (45 hours), you will learn how to grade coloured gemstones using GIA GemSet, GemDialogue, the World of Color and ColourWise and how to grade opals, jadeite and pearls.

The Spanish Gem Academy (SGA) offers accredited World Gem Foundation practical diamond grading courses. Earn credits towards your Career Gemmologist and Diamond Professional Diplomas. In this six day workshop (45 hours), you will learn how to grade diamonds using the GIA system for colour, clarity and cut and how to measure the table %, crown angle, girdle thickness, pavilion depth %, symmetry & polish.

In this four-day workshop (30 hours), you will learn how to grade coloured gemstones using GIA GemSet, GemDialogue, the World of Color and ColourWise.

In this two-day workshop (15 hours), you will learn how to grade opals, jadeite and pearls.