Pink ChalcedonyA pink chalcedony shows off its beauty ... Silicates—including quartz, mica, olivine, and precious minerals such as emeralds—are the most common class of minerals, as well ...

T hundereggs look like regular rocks from the outside, but contain intricate and colorful mineral patterns inside — often ...

a city whose mineral resources once prompted ... sculpted in blue chalcedony from China, and a 15-pound quartz crystal, called Star Seeker, that she has been carving for the past two summers ...