feldspar – mineralcollectionblog
Morphology of Colombian Emerald: Some Less-Common Cases and Their Growth and Dissolution History
How much of a raw diamond is lost while being cut? - Quora
Can you fix a chipped diamond? - Quora
Diamond Crystal Diagrams from Goldschmidt's Atlas der Krystalformen
Crystals, Scrap gold, Crystal drawing
Shapes of crystals, from Minerals {Hamlyn}
Diamond Crystal Diagrams from Goldschmidt's Atlas der Krystalformen
FMF - Friends of Minerals Forum, discussion and message board :: View topic - New book:Crystal Forms of Fluorite - Kristallformen von Fluorit