Big and important question. Difficult one also. So I started researching.
I read that a jewelry collection - my 'stuff' - consists of 4 to 7 different designs and some orphan pieces.
Those 4 - 7 designs have to be different in length, cost, target audience (younger or older woman, girls), necklaces for daytime, jewelry you would wear to go to a party etc.
After having read this, I bought 5 different colours of silk thread and a bunch of glass beads to go with the silk thread.
I took out my sketch book and started drawing: longer necklaces, chokers, with crochet tubes, with crochet beads and tubes, only with crochet beads and so on.
After this I picked my favourites, took my crochet hook (finally!) and started working.
The idea is to have different pieces, but that still make a collection. The same five colours of silk thread will be used for each part of the collection.
This is what I got so far:
A longer necklace. As you can see the necklaces have the same design, but because of the difference in silk thread and the glass beads, appeal to an entirely different type of woman.
And these three: the same silk thread, crochet tubes combined with crochet beads and glass beads. Some of the glass beads are the same as used in the longer necklaces, others are different. Again, three different necklaces, but still clearly forming part of the same collection.
In total I have drawn 5 different designs and bought 5 different colours of silk. So my collection will consist of 25 different necklaces. I will also be making matching earrings and bracelets.... plenty of work on my plate! I'd better get going!