I'm designing a jewelry site and I'd like gold weight/carat and diamond karat based pricing apart from base price (making/design charges) of the jewel.
The jewel price is completely decided based on how much it weighs and how much the diamond weighs. How do I set the pricing based on that
For example, a ring could have multiple customisation options like what purity of gold should it have (18k or 22k) or what kind of diamond to be used, based on diamond purity ranging from A to Z, diamond color from white to yellow. All these parameters decide the final price of the jewel.
Also I need to be able to update the gold per gram price on a day to day basis in the admin side so the price gets affect all over the site. The gold price may not be the same everyday, I want to able to give that flexibility to reduce prices when the prices fall. MANDATORY FEATURE
So there could be 3 grams of 22 carat gold or 5 grams of 18 carat gold. so 1 carat of 18k gold has so much percentage of gold and rest copper in it. How do I price these? I have option buttons for choosing category at the product page and I'd want the pricing to change as they are customizing their jewels.