https://www.gemsociety.org/course/mineralogy-certification/
Learn the fundamentals of mineralogy, from optical and physical properties to classification, crystallography and testing. Become an IGS-certified Mineralogy...
mineralogycertificationcourseonlinediamonds
https://webmineral.com/
Complete, up-to-date, mineral database containing 4,714 mineral species descriptions and comprehensive picture library of images. These data are linked to...
mineralogydatabase