$290,750,000.00
2500
Not that much
Cheap rubies can cost $2 per carat up to $10,000 or more for nice ones. I have bought many in India and the cost does not depend on the country but the quality
how much for a 2 carat solitare ring worth
1 carat equals .2 grams
The price of a ruby depends on its color, cut, clarity and carat weight. A .50 carat, round, VS clarity and purplish-red ruby is for about $2500.
Without having the ruby in front of a gemologist there is no way to tell. Rubies are graded much the same way that diamonds are. They are graded on Cut, Color, Clarity and Carat with the exception that color has much more impact on the value. Please see the link below for a better understanding of the grading process.
Nothing at all...
The carat weight of the stones can be measured by a certified gemologist.
£2
1 Carat = .2 grams = 100 points