Resultado da Busca
Emerald Chat is a platform for meeting and chatting with people from around the world based on your interests. It offers features like interest matching, text chat, video chat, group chat, photo sharing and more.
Discover impactful Journals, Books & Case Studies from Emerald Publishing on Emerald Insight.
Emerald é uma editora acadêmica que publica revistas, livros e estudos de casos em diversas áreas de gestão e engenharia. Neste site, você pode encontrar informações sobre os produtos e serviços da Emerald, bem como dicas para autores.
Emerald is a gemstone and a variety of the mineral beryl (Be 3 Al 2 (SiO 3) 6) colored green by trace amounts of chromium or sometimes vanadium. Beryl has a hardness of 7.5–8 on the Mohs scale. Most emeralds have many inclusions, so their toughness (resistance to breakage) is classified as generally poor. Emerald is a cyclosilicate.
Learn about emerald, the bright green gem of the beryl mineral family and the May birthstone. Find out how to identify, value, and care for emeralds, and explore their geologic and cultural history.
- One direction of imperfect cleavage
- Vitreous
- Transparent to translucent
- 7.5 to 8
Learn about emerald, the bluish green to green variety of beryl, a mineral species that includes aquamarine. Find out about its history, lore, quality factors, treatments, synthetics, and more.
Há 1 dia · Learn about emeralds, the green gemstones formed from beryl with chromium, vanadium and iron. Discover their origins, meanings, prices and famous examples.
