On Paladin Concepts
Course 106, Lab Grown Diamonds: www.paladinconcepts.com/elearning-106
Course 107: The Natural Diamond Story
Course 111: Four Cs, Part One: www.paladinconcepts.com/elearning-macys-111
Course 112: Four Cs, Part Two: www.paladinconcepts.com/elearning-macys-112
Tutorial: Colored Gemstones: www.paladinconcepts.com/elearning-colored-gemstones
On IGI.org
Course 106: Lab Grown Diamonds: www.igi.org/elearning/macys/106
Course 107: The Natural Diamond Story
Course 111: Four Cs, Part One: www.igi.org/elearning/macys/111
Course 112: Four Cs, Part Two: www.igi.org/elearning/macys/112
Tutorial: Colored Gemstones: www.igi.org/press/igi-elearning-tutorial/
Landing Page
IGI Landing Page: www.igi.org/elearning