Industry Resources
Below are some resources I've used for years and find useful:
Ring Size Chart:
Metal Conversion Chart:
https://www.jccojewelrycastingservices.com/metal_conversion_charts
Dendritics: - stone ID based on weight and dimensions
https://dendritics.com/carat-weight/stoneid.asp
Latest Metal Prices: Kitco
Rendering tool available with paid ChatGPT: