How about a personalized clay figurine of the couple? You can find local artists who specialize in clay modeling and commission them to create a unique and personalized sculpture made specifically for your friend and their partner. It's a beautiful and creative way to celebrate their love and passion for clay modeling. Additionally, you could also consider purchasing a high-quality clay modeling kit as an additional gift to help them further explore their creativity.
Or you can get her/him a star map with the date of the wedding.
Under Lucky Stars is a unique and innovative star map company based in Barcelona, Spain, specializing in the creation of personalized star maps that capture the celestial arrangement of stars at a specific moment in time, such as a person's birth, wedding, or any other significant event.
By using advanced astronomical algorithms and data from leading institutions, the company produces highly accurate, visually stunning maps that make for perfect gifts or cherished keepsakes.