How hard is a diamond? What is the difference between granites and garnets? Minerals are the building blocks of rocks. They are inorganic, crystalline solids with a known chemistry. Examples of ...

Use the navigation TAB or the BACK button to return to the list of 24 drawers. Or click on the text below each picture to advance to the next drawer. Be sure to also check out the Rock & Mineral KITS ...

New Zealand’s critical minerals list features 37 commodities New Zealand ... “It is essential therefore that local aggregate (rock and sand) resources throughout the country are identified ...

A weathered sign in the Minnesota River Valley proudly proclaims: “World’s Oldest Rock.” Erected in 1975, it marks a 3.8-billion-year-old gneiss — or so scientists thought.

The text of the deal lists 55 minerals but says more can be agreed to. Trump has repeatedly expressed interest in Ukraine’s rare earth elements, and some of them are included in the list, as are other ...