Magento product attributes advice

General information for the website: jewellery attributes
Description of requirements/features: Im have built a magento website for jewellery sale

I only need to ask for advice here, this is not the job to do anything, but only just to show me how i can upload engagement rings to my magento website that each single product page looks exactly like here with a dropdown menu: http://alizadiamonds.co.uk/products/Engagement-Ring-Cayla-%23rx2764.html

Customer chooses variations and the price below changes accordingly

I need to see how to list one engagement ring with following attributes:

Carat: 0.3 ; 0,4 ; 0.5 ; 0.6 ; 0.7 ' 0.8 ; 0.9 ; 1 ; 1.50 ; 2

clarity: IF, VVS2, VVS1, VS1, VS2, SI1, SI2

Colour: D, E, F, G, H, I

Certificate: GIA, IDRC

So each ring will have total variations: 10 x 7 x 6 x 2 = 840. All these 840 variations have unique fixed price, there is no set formula where is the base price and some other price on top. All 840 variations here have completely random unique price

I have 50 engagement rings to upload like that each with 840 variations

AS you understand manually it will be impossible to upload all of them, so looking that someone shows me how to create a CSV file and bulk upload all at once to magento
Extra notes: