Is this a good price?

[taicow]

I have bought a round diamond in 1.00 carat, it's about $5800, is it worth
Color: H
Clarity: IF
Fluorescence: none
Culet: None
Table: 60%
Depth: 62.6%
Girdle: Thin to Slightly thick
Polish: Very Good
Symmetry: Good
Measurements: 6.33 x 6.38 x 3.98
Certificate: GIA
Crown angle is greater 35%

 

[Mongol]

Try the pricescope tool.

I am no diamond whiz but with a crown angle >35 degrees is considered top heavy and results in a smaller diameter. A smaller diameter makes the Diamond look smaller than it really is.

Also I would assume you had your reasons for buying a IF clarity diamond. The guide I follow for Diamonds says the corresponding grade for color H is VS1-VS2.