cut, and carat weight — though diamonds, rubies, emeralds, and sapphires generally sell for the most money. According to IGS, 4 a crystal is a solid whose atoms are arranged in a “highly ...

They arranged dozens of red Solo and clear plastic cups, each containing one alum crystal, on the room’s large wooden table.

In 1981, for example, when Smithsonian researchers tried to cut through a large iron ... Unlike the Smithsonian diamonds, these microscopic crystals contain an isotopic mixture of xenon gas ...

When cut, gemologists prefer shapes like ... This crystal is so scarce that for every red beryl crystal found, there are ...

Their proposed method, outlined in a paper published in Nature Physics, relies on new diamond phononic crystals that they designed and fabricated, which can be used to engineer the local density ...

To mark the on-screen milestone, the triple threat singer, actress and style maven opted for a glamorous gilded gown, ...