Take a walk down the mineralogy collection of any good natural history museum and your face will be aglow with the sparkle of minerals, crystals, and gemstones – but what’s the difference ...
Large crystals found in geodes and other rocks are relatively rare. Pink ChalcedonyA pink chalcedony shows off its beauty. Chalcedonies include many types of cryptocrystalline quartz gems and ...
When we talk about crystals around here, we’re generally talking about the quartz variety used to make oscillators more stable, or perhaps ruby crystals used to make a laser. We hardly ever talk ...