Blue Quartz: Mineral information, data and localities.

An opaque to translucent, blue variety of quartz, owing its colour to inclusions, commonly of fibrous magnesioriebeckite or crocidolite, or of tourmaline.

Celestine: Mineral information, data and localities., ralf morales ojo

How cities will fossilise

Azurite - Wikipedia

Pyroxene Common Minerals

Blue Quartz – Declan's Mining Co.

Chalcedony: Mineral information, data and localities.

Blue Quartz – Mineralogy

Australian mineral facts

Blue Smoke Quartz-Rare Blue Smoke Quartz -Colombian Blue Smoke

PDF) BLUE QUARTZ AROUND THE GLOBE

Found: Thousands of Man-Made Minerals--Another Argument for the Anthropocene