This is the talk page for discussing improvements to the Viking Age article. This is not a forum for general discussion of the article's subject. Put new text under old text. Click here to start a new topic. Please sign and date your posts by typing four tildes (~~~~).
In addition, it must be hard and durable. Its value increases if it is also rare.The beauty of a gem is measured in terms of its clarity, brilliance, and color. Comments
Either, or both. Minerals are usually considered gems if they are valuable, attractive and highly pure. Minerals are considered ores if they are used to extract a substance. F â¦ or example, pure haematite is polished and sold as a gem, while crude haematite is used to extract iron.