Diamond with Fracture Filling to Alter Color Intensely Colored Type IIa Diamond with Substantial Nitrogen-Related Defects Diamond with Unusual Overgrowth Euclase Specimen with Apatite and Feldspar "Cherry Quartz” Glass Imitation Cat’s-Eye Opal “Blue” Quartz Heat-Treated Ruby with a Large Glass-Filled Cavity Play-of-Color Zircon To view the full section, download the PDF above.
Diamond with Fracture Filling to Alter Color Intensely Colored Type IIa Diamond with Substantial Nitrogen-Related Defects Diamond with Unusual Overgrowth Euclase Specimen with Apatite and Feldspar "Cherry Quartz” Glass Imitation Cat’s-Eye Opal “Blue” Quartz Heat-Treated Ruby with a Large Glass-Filled Cavity Play-of-Color Zircon To view the full section, download the PDF above.
