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"
Shades of green of its unofficial mascot, the Dartmouth Indian, in 1974. Dartmouth green and white are the main colors of Lithuanian basketball club Žalgiris Kaunas. "Emerald", also called "emerald green", is a tone of green that is particularly light and bright, with a faint bluish cast. The name derives from the typical appearance of the gemstone emerald. The first recorded use of "emerald" as a color name in English was in 1598. Ireland is sometimes referred to as the "Emerald Isle" due to its lush greenery. The May birthstone is emerald. Seattle is sometimes referred to as the "Emerald City", because its