How is the Best Way to Catalog Jewelry?

by Kim.
(U.S.)

I have been using a system of 3×5 cards that include unique item numbers and name of the piece.

The cards also have a list of components and their costs, pricing info that includes wholesale and retail formulas and notes that may contain provenance of a particular element.

Each item I make is unique, so I like to have a record of each piece.

The problem is that when I start creating numerous pieces, there is a problem with duplicating item numbers.

While I can be more diligent about this, does anyone have a method of cataloging that they would like to share?

Thanks!

Kim