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.
The Basics of VVS Diamonds. VVS, or very very slightly included, diamonds have small inclusions that are undetectable to the human eye. In fact, these inclusions are so small that they are difficult to see even with 10x magnification. Typically, VVS diamonds are split into VVS1 and VVS2 subcategories.