What is the difference between precious vs. semi precious gemstones? According to the International Gem Society, 2 today’s gemologists don’t typically classify gemstones as precious or semi ...

Amethyst . A member of the quartz family, amethysts with intense, rich purple shades have long been considered the most precious of these n ...

Adding to this trend is the resurgence of semi-precious stones like moonstones, aquamarines, and spinels. These gems, with their soft colours and subtle luminosity, are redefining the concept of ...

Finding lubricants that work at exceptionally high temperatures challenges researchers and industries alike. A Virginia Tech ...