Dom Pedro, the World's Biggest Aquamarine Gem. The obelisk-shaped, blue-green gem, which was designed by famed German gem cutter Bernd Munsteiner, known as the "father of the fantasy cut," stands 14 inches (35.5 centimeters) tall and weighs 10,363 carats, or 4.6 pounds (two kilograms). (Link)
The pink diamond is the worlds most expensive diamond @ 11 million with 5 carats & two white diamonds on either side. Pink diamonds are considered the most rare and generally found only in lower carat weights.
Arusha Tanzanite A natural, untreated tricolor Tanzanite. The crystal structure of Tanzanite shows three different colours: blue, purple and green. Mainly blue surrounded by some green and purple. The flowing patterns of the Liquid Flower design shows a fine play of these colours. A small veil is visible in the left corner, but not too prominent. 5.96 cts., 11.5 x 7.0 mm,