Catalog items are added to your store as individual products, so you build sets and bundles yourself in Shopify.
Selling a matching set
To sell a ring, earrings and pendant together:
Publish each piece to your store as its own product.
Create your own bundle listing in Shopify, at your own bundle price.
Some of the newer catalog additions are already ready-made bundles and sets. Those you can list as-is, with no assembly on your side.
When a customer orders more than one item
Because Branvas holds its inventory in-house, everything in an order is packed together and ships as one parcel, no matter how many pieces the customer buys.
A listing shows two colors but I can't choose one
The most common reason is the piece is reversible by design. The Lucky Clover Beaded Bracelet, for example, is black on one side and white on the other — the two colours in the images are the same product, worn two ways.