Jewelers can create multiple Collections/categories/Subcategories to uniquely categorize their products on the Website. 

Jewellers, based on these Collections/categories/Subcategories can assign can automate product pricing. 

How to create a Collection/Category/Subcategory?

Go to Product > Go to Collection > Type the Collection name > Add collection > Save 

The New Collection is now created and can be accesses easily while adding other products.