Beryl phase along fractures or within near-surface miarolitic cavities of the rhyolite. Associated minerals include bixbyite, quartz, orthoclase, topaz, spessartine, pseudobrookite and hematite. Beryl Beryl ( ) is a mineral composed of beryllium aluminium cyclosilicate with the chemical formula BeAlSiO. Well-known varieties of beryl include emerald and aquamarine. Naturally occurring, hexagonal crystals of beryl can be up to several meters in size, but terminated crystals are relatively rare. Pure beryl is colorless, but it is frequently tinted by impurities; possible colors are green, blue, yellow, red (the rarest), and white. Beryl is also an ore source of beryllium. The name "beryl"
Gemstones of Pakistan to their report, 29759 tons of quartz was produced in Mohmand agency in 2003-2004. However, the gemstone sector in the region is not developed and many resources have not been properly identified and exploited. The three mountain ranges of Gilgit-Baltistan; Himalayas, Hindukush, and Karakoram contain many minerals and gems including emerald, ruby, sapphire, aquamarine, moonstone, and amethyst. A number of other minerals are also found in the region such as peridot, tourmaline, topaz, garnet, red spinal, pargasite, diopside, sphene, apatite, azurite, rose quartz, and agate. In Swat, pale green to green coloured emeralds can be found in talc-carbonate schist. In