Some information about diamonds and how they are categorized.

• Half-caraters, one-caraters, and two-caraters: Diamonds that weigh half a carat, one carat and two carats.
• Melees: stones weighing up to one carat.
  • The Gemological Institute of America (GIA) defines melee diamonds as diamonds that are less than 0.2 Carats.
• Makeables: gems that can be cut.
• Solubles: small gems that need polishing.
• Categorized industrials: Low grade diamonds used for industrial machinery.
• Fancy stones:
  • Valuable rare specimens. They come in every color of the spectrum, including blue, green, pink, and red.
• Gems: diamonds weighing more than two carats.
• Corundum: Worth little in Sierra Leone. Extremely hard aluminum oxide, used as an abrasive. Ruby and sapphire are varieties of corundum.
• Kimberlite: The rocks with diamonds in them. Kimberlite is an igneous rock and a major source of diamonds. Igneous means formed by solidification of magma or lava. Igneous can also describe something that is like or contains fire!
• Digital carat scale: A scale used to weigh diamonds.
• Diamond sifter: Used to sort diamonds by their carat weight and size.