Hello, I'm looking for a two carat round diamond, I have approx $18,000-$20,000 for it. What can I expect quality wise with this budget? I have been to Robbin's Brother's and Helzberg Diamonds to look so far. I have been shown a 2.0 carat round with Very good cut, excellent polish and symmetry. No fluorescence and no clouds or crystals or knots. (what ever that means?) Table 59% depth 63% ,SI 2 , GIA. G color. The price for this stone is Approx $20,000. I don't know that much about diamonds so not sure what this all means besides the basics. Is GIA and AGI the best choice? I like the service and guarantee that these two stores provide. Is this a good price for this stone? Any help is appreciated.