This 1991 Hewlett Packard six inch silicon wafer is a real beauty. It's labeled 1XB8 and contains over 150 memory chips.
It's highly iridescent and very colorful in artificial light or sunlight. These photos were made under common white led room lights.
See many other rare and beautiful tech collectibles in my store and thanks for looking!
Don't see what you want? Ask me. I've been collecting for many years and have thousands of wafers and chips in my private stock.