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.
Wire comes in three different forms of hardness: dead soft, half-hard, and full-hard. Below are some basic definitions for each type: Dead Soft: As the term indicates, this wire is very soft and can be bent with your hands. It is often used for wire-sculpted jewelry. Half-Hard: It is harder than dead soft wire because it has been pulled through a draw plate (a tool with holes in it the same size and shape of the wire).