13mm 6 Carat Round Cut Natural Colombian Emerald Loose Gemstone. A medium light tone of a very slightly bluish green with a strong saturation. Copy of MVI 9230 13mm 6 Carat Round I - YouTube. Video will open in a new window. C arat wt: 6.18. Exact dimensions: 12.95mm Diameter x 7.29mm Deep. Color: Very slightly bluish green. Treatment: Light colorless oil (cedar). The photos were taken using a digital SLR camera mounted with a 60mm macro lens. I believe the photos are accurate images of the stones' clarity and color but please keep in mind that no two monitors will show color and tone the same. Check out my other items. Be sure to add me to your favorites list. The item "13mm 6 Carat Round Cut Natural Colombian Emerald Loose Gemstone" is in sale since Sunday, October 08, 2017. This item is in the category "Jewelry & Watches\Loose Diamonds & Gemstones\Loose Gemstones\Emerald\Natural Emeralds". The seller is "importmanagers" and is located in Cocoa, Florida. This item can be shipped to United States, all countries in Europe, all countries in continental Asia, Canada, Australia.