How do you assort diamond?

Answer 1

Raw diamonds are probably sorted first as to colour and clarity, those being the highest-value natural characteristics.

When cut and polished, the goal is to preserve as much of the stone's clarity as possible while holding up its carat weight. Often the cut of a diamond is determined by these factors.

For example, this means that larger fancy coloured or 'white' diamonds can be cut in the emerald style, because of the cut's ability to show off flawless or internally flawless clarity and desirable colour.

Answer 2

If you are a jeweler and a customer commissions diamond jewelery, you present a case of different sized, cut, and colours of diamonds for the customer to choose from -- your diamond assortment.

When the customer selects the diamonds to be included in the jewelery, then you can describe those diamonds together as your customer's diamond assortment.