Peridot
/ˈpɛɹ.ɪ.dɒt/
"Peridot" in a Sentence (2 examples)
Gem-quality olivine is known as peridot, which has a subtle green light all its own.
Although there are dozens of different types of gems, among the best known and most important are […]. (Common gem materials not addressed in this article include amber, amethyst, chalcedony, garnet, lazurite, malachite, opals, peridot, rhodonite, spinel, tourmaline, turquoise and zircon.)