Pure quartz, or “rock crystal” from Brazil. Source: Didier Descouens, CC BY-SA 4.0 Pick up a rock almost anywhere on Earth and chances are pretty good that there’s at least some quartz in it.

Iron treated wood retains its natural behavior but gains in internal durability -- paving the way for greener alternatives in ...

(2) The multiple medieval Christian interpretations honor the miraculous nature of God and are reinforced by the relic’s visibility within this ideologically charged rock crystal. Although the clear ...

Renowned for its rich mineral deposits, particularly quartz crystals, Fisher Mountain has ... gem museum filled with both its finds and other rocks, gems, and minerals from areas around the ...