Here is my suggetion to you, Since you have two tables i.e. Jewelry and Jewelry parts, the relationships you want to establish among them should be like Primary key of Jewelry --> Foreign key of Jewelery parts.
Means there should be a field like Jewelery Number present in Jewelry parts table as foreign key which is the primary key of Jewelry table. You just copy the Jewelry Number of Jewelry table and paste at Jewelry Number of Jewelry parts Table. Now just take relationships among them by joining Jewelry. Jewelry Number= Jewelry parts. Jewelry Number so that you can able to get which are the jewelry parts of a particular jewelry.
Now to view the parts which are related to a particular jewelry in the jewelry layout you can draw a portal based on Jewelry parts table having all fields of Jewelry parts table. It will show you all the parts related to a particular jewelry.
I think it will work correctly.
Table: Jewelry Table: JewelryParts
_kp_JewelryID = _kf_JewelryId
(auto ent serial) _kp_JewelryPart(auto ent serial)
"double click on the relationship
and check (allow creation in this table..."
Make a portal in the Table: Jewelry...this portal will be based on table:JewelryParts.
Also to keep the data intact in jewelryparts from changing...do a "lookup" for the information in jewelry parts
Hope this helps usually a diagram is a lot easier to follow than just words
Here's a demo file created by Comment that you may want to look at:
Think of Invoices as your jewelry table, Line Items as your list of parts that make up an item of jewelry and Products as a master list of parts from which you look up info while documenting the design of a given item of jewelry.