Locations of the investigated gem minerals from Egypt and Saudi Arabia. Scaled photos of colored gem minerals are given. For all, field of view (FOV) = 4 cm. (1) Peridot, Zabargad (St. John’s), off the Egyptian Red Sea coast. (2) Peridot from Harrat Kishb (volcanic field), Saudi Arabia. (3a) Emerald and (3b) Amazonite, Wadi Sikait, Wadi El-Gemal area, Eastern Desert, Egypt. (4) Low-grade emerald (beryl), Wadi Ghazala, Sinai Peninsula, Egypt. (5) Amethyst, Aswan area, Eastern Desert, Egypt.