Betelgeuse, a bright star in the constellation of Orion, is much cooler, about 6,900 degrees F, and so even to the naked eye has an easily identified red hue. The brightest star in the night sky, Sirius (also known as the Dog Star), has a surface temperature of about 18,000 degrees F, which gives it its bluish tinge.
At 1109-carat, the Lesedi La Rona is the largest gem-quality rough diamond to be discovered in over a century and the largest Type IIa rough diamond in existence today. Image: Lucara Diamond Corporation. At 118.78 carats, the âThe Graff Venusâ is the worldâs largest D-color, Type IIA, flawless heart-shaped diamond.
There are 10 basic diamond shapes to choose from: round, princess, emerald, Asscher, cushion, radiant, pear, oval, marquise and heart. Read on to find out more about each shapeâand which one fits your or your fiance's personality the best! And note, the term diamond cut does not refer to its shape. While you must cut a diamond to make a shape, the shape is essentially the overall geometry or form of the diamond (round, square and so on), while the cut is the diamond's facets and proportionsâthe things that give diamonds their brilliance and fire.