Knowing what materials can be used based on a concept is very important. What is the difference between different karats because on metal is softer than the other ? What are the price points for different quality diamonds ? You saw a piece of jewelry can you recreate that ?
2. Decide On A Budget
Deciding on a budget give realistic parameters on the capabilities of the project.
3. Design or Select from Available Item(s)
The designs for custom work vary depending on detailed the designs are. There is no set pricing. The price is custom just like the items.