In looking at emeralds with GIA certs. I'm very confused about the enhancement information and the differences between F1, F2, F3 and F4. I assume F1 means oil. But what do the others mean? I wish they would provide more specific information. For example, I have found several really beautiful stones that are labeled F2, but they don't explain what that means. Could someone please clarify this?
Also, no matter how many emeralds I look at, I still don't understand the difference between a stone that is "vivid green", versus a stone that is "intense green". I've seen several stones that were listed next to each other with one being a vivid green and the other being an intense green. They look exactly the same!?!?!? Also, I am not color blind...I've been tested. Lastly, which is more valuable...vivid or intense? Thanks in advance for any help you guys could provide.
One last question. For long term investment purposes (I'm just curios as these will become family heirlooms), does the stone need to be a certain size to be considered investment grade? For example, would a 2 carat, high quality, colombian stone, appreciate in value? Or would it need to be 3 or 4+ carats? Obviously, the larger the stone, the better the investment. I'm just wondering if there is a certain minimum size that qualifies as investment grade.
Also, no matter how many emeralds I look at, I still don't understand the difference between a stone that is "vivid green", versus a stone that is "intense green". I've seen several stones that were listed next to each other with one being a vivid green and the other being an intense green. They look exactly the same!?!?!? Also, I am not color blind...I've been tested. Lastly, which is more valuable...vivid or intense? Thanks in advance for any help you guys could provide.
One last question. For long term investment purposes (I'm just curios as these will become family heirlooms), does the stone need to be a certain size to be considered investment grade? For example, would a 2 carat, high quality, colombian stone, appreciate in value? Or would it need to be 3 or 4+ carats? Obviously, the larger the stone, the better the investment. I'm just wondering if there is a certain minimum size that qualifies as investment grade.