A REPORT of the discovery of olivine in the Orgueil carbonaceous meteorite 1 aroused considerable scepticism 2,3. The identification was based on selected area electron diffraction patterns ...

Peridot, spinel and sardonyx are August's three birthstones. Peridot is a yellow-green stone that comes from the mineral olivine. Some believe its name derives from the Arabic "faridat," or "gem ...