Diamond - Wikipedia
网页Diamond is a solid form of the element carbon with its atoms arranged in a crystal structure called diamond cubic. Diamond as a form of carbon is a tasteless, odourless, strong, brittle solid, colourless in pure form, a poor conductor of electricity, and insoluble in water.
Diamond (gemstone) - Wikipedia
网页The diamond is the birthstone for people born in the month of April, and is also used as the symbol of a sixty-year anniversary, such as a Diamond Jubilee (see hierarchy of precious substances). In a system of heraldry by gemstone occasionally used in the past for the arms of nobles, diamond was used to represent the color sable, or black. [53]
Natural Diamonds | Diamond Stone – GIA C
网页Get to know all you need about diamond – the history, facts, quality factors, treatments, imitations and much more here at GIA.
Diamond | Definition, Properties, Color, Applications, & Facts
网页2024年8月22日 · A diamond is a mineral composed of pure carbon. It is the hardest naturally occurring substance known; it is also the most popular gemstone. Because of their extreme hardness, diamonds have a number of important industrial applications.
Diamond Description
网页Diamond is the only gem made of a single element: It is typically about 99.95 percent carbon. The other 0.05 percent can include one or more trace elements, which are atoms that aren’t part of the diamond’s essential chemistry.
Diamond: A gem mineral with properties for industrial use
网页Diamond is a rare, naturally occurring mineral composed entirely of carbon. Each carbon atom in a diamond is surrounded by four other carbon atoms and connected to each of them by strong covalent bonds - the strongest type of chemical bond.
GIA Diamond Grading | GIA 4Cs
网页The GIA Diamond Grading Report. This report uses the universally accepted GIA standards to determine a natural diamond’s shape, color, clarity, cut and carat weight – as well as proportions, finish and treatments. It also includes a plotted diagram which maps your diamond, identifying its unique characteristics. The GIA Diamond Origin Report.
Koh-i-Noor - Wikipedia
网页Babur, the Turco-Mongol founder of the Mughal Empire, wrote about a "famous" diamond that weighed just over 187 old carats – approximately the size of the once 186-carat Koh-i-Noor. [19] [20] According to the diary of Alauddin Khalji of the Khalji dynasty of the Delhi Sultanate, he acquired a large diamond when he invaded the kingdoms of southern …
Diamond Shapes & Cut Types: Education & Shape Charts - Tiffany …
网页Diamond shapes are categorized into two groups: round diamonds and fancy shape diamonds. Round brilliant diamonds are the most traditional diamond shape. Tiffany fancy shape diamonds include princess, cushion, emerald, oval, pear, marquise, heart and our exclusive Tiffany True® diamond.
Diamond | Properties, Formation, Occurrence, Deposits - Geology …
网页2024年7月1日 · What is a diamond? A diamond is a naturally occurring mineral made up of pure carbon atoms arranged in a crystalline lattice structure. What makes diamonds so valuable? Diamonds are highly valued for their unique optical and physical properties, including brilliance, fire, and hardness.