Appealing to collectors of Earth's ancient treasures, Heritage Auctions is selling rare meteorites, fossils, and gemstones.

Rare Earth Gallery has what you want. The north Valley shop carries a truly impressive assortment of rocks and crystals, from a palm-sized heart-shaped quartz to epic amethyst slabs that cost ...

So with all this in mind, how can the addition of nitrogen to iron make magnets that have properties comparable to rare-earth magnets? Again, it’s partly to do with the crystal structure ...

Large crystals found in geodes and other rocks are relatively rare. Pink ChalcedonyA pink chalcedony ... are the hardest natural substance found on Earth. Formed under extremely high pressure ...

The ultra-high-density optical memory device would consist of numerous memory cells, each containing rare earth elements embedded within a solid material — in this case, magnesium oxide (MgO) crystals ...

The resulting crystals were characterized using single-crystal X-ray ... Giant magnetocaloric effect in a rare-earth-free ...

Rare Metal The metal iridium, which is similar to platinum, is very rare on Earth's surface but is more ... the dinosaur extinction. Fractured Crystals These crystals, often called "shocked ...

It could be said that minerals are salt-of-the-earth, crystals are organized ... Their ordered atomic arrangements are why ...

The researchers propose bypassing this limit by stuffing the material with rare-earth emitters, such as magnesium oxide (MgO) crystals. The trick, called wavelength multiplexing, involves having ...

The team found unique plumes of ice clouds near 67 metal and cement factories, paper mills and power plants in North America, ...